To smooth ur drawing out I would either do one of these options
If ur on digital then create a new layer and make your drawinn into simple shapes then slowly add little details.
or
there’s some great videos on clean line art on yt that I recommend to create clean line art be confident in ur strokes don’t make alot of little strokes.
this ones my favorite when ever you try/make something again it’s 90% always better. So just erase everything and redo it and have the mindset less details just the key ones that make a chameleon a chameleon: the feet :the eyes : the tail: the crest etc
or you got a really good one to start with
sorry I suck at tips

wish u luck