Assuming that its still in the little glass cage still...if you bought a long linear Repti-sun 5.0 UVB light and hood to go with it you could lay it across the back of the cage and remove the basking light as long as the temperature in the cage stays in the low 80's by doing that. Young chameleons have small bodies that can overheat, cool, dehydrate much more quickly than the adults so temperatures in that range (low 80's F) are fine for them. It also keeps them from growing too fast and possible developing bone issues if the "newbie" keeper hasn't got everything spot-on at first.
You said the cage is near a window...does the sun shine directly on the cage at any time? If so I would consider moving it somewhere else. Do you have air conditioning?
At that age you can feed her as much as she will eat in a minute or two for the first feeding of the day and leave a cricket or two in the cage for her to eat later. Make sure the crickets are of a size that would fit into her mouth easily. (Width between her eyes.)
Fake plants will do for a while, but veileds will eat plants so once its a couple of months old, I would switch to real ones. Be sure to wash them well (both sides of the leaves) before using them in the cage. I would also cover the soil with pebbles that are definitely too big for the chameleon to ingest so that it won't eat the soil.
Some of the following has been mentioned already...but I'm mentioning it again rather than re-reading all the posts...
As has been suggested...I would remove the substrate. Often substrate can be ingested and lead to impaction...as well as harbor bacteria and mold if kept too moist.
I gutload/feed my crickets, locusts, superworms, etc. a wide variety of greens (dandelions, kale, collards, endive, escarole, etc.) and veggies (carrots, squash, zucchini, sweet red pepper, sweet potato, etc.). I don't like most commercial foods since it makes it harder to balance the nutrients...but there are a few out there that come highly recommended.
A dripper can be made with a plastic (take-out) cup that has a very tiny hole punched in the bottom of it. It should drip at the rate of one or two drips per second.
Here's the gist on supplements...and a few good sites for you to read...
Appropriate cage temperatures aid in digestion and thus play a part indirectly in nutrient absorption.
Exposure to UVB from either direct sunlight or a proper UVB light allows the chameleon to produce D3 so that it can use the calcium in its system to make/keep the bones strong and be used in other systems in the chameleon as well. The UVB should not pass through glass or plastic no matter whether its from the sun or the UVB light. The most often recommended UVB light is the long linear fluorescent Repti-sun 5.0 tube light. Some of the compacts, spirals and tube lights have caused health issues, but so far there have been no bad reports against this one.
Since many of the feeder insects have a poor ratio of calcium to phosphorus in them, its important to dust the insects just before you feed them to the chameleon at most feedings with a phos.-free calcium powder to help make up for it. (I use Rep-cal phosphorus-free calcium).
If you also dust twice a month with a phos.-free calcium/D3 powder it will ensure that your chameleon gets some D3 without overdoing it. It leaves the chameleon to produce the rest of what it needs through its exposure to the UVB light. D3 from supplements can build up in the system but D3 produced from exposure to UVB shouldn't as long as the chameleon can move in and out of it. (I use Rep-cal phos.-free calcium/D3).
Dusting twice a month as well with a vitamin powder that contains a beta carotene (prOformed) source of vitamin A will ensure that the chameleon gets some vitamins without the danger of overdosing the vitamin A. PrEformed sources of vitamin A can build up in the system and may prevent the D3 from doing its job and push the chameleon towards MBD. However, there is controversy as to whether all/any chameleons can convert the beta carotene and so some people give some prEformed vitamin A once in a while. (I use herptivite which has beta carotene.)
Gutloading/feeding the insects well helps to provide what the chameleon needs. I gutload crickets, roaches, locusts, superworms, etc. with an assortment of greens (dandelions, kale, collards, endive, escarole, mustard greens, etc.) and veggies (carrots, squash, sweet potato, sweet red pepper, zucchini, etc.)
Calcium, phos., D3 and vitamin A are important players in bone health and other systems in the chameleon (muscles, etc.) and they need to be in balance. When trying to balance them, you need to look at the supplements, what you feed the insects and what you feed the chameleon.
Here are some good sites for you to read...
http://chameleonnews.com/07FebWheelock.html
http://web.archive.org/web/200605020...Vitamin.A.html
http://web.archive.org/web/200406080...d.Calcium.html
http://www.uvguide.co.uk/
http://web.archive.org/web/200601140...ww.adcham.com/
If you can't access the sites above that have the word "archive" in you can do it through the WayBackMachine.
Hope this helps!