yeah she has alot of growing an filling out to do yet. I'd still put a small laying bin in her cage either way though. You are a newb and you may not notice the subtle changes in her when she does mature. You want her to have a bin in there in case she has some infertile eggs to lay. A small container with 6-7" of soil will do. If she starts messing around and digging but wont lay you may have to move her to a larger bin to complete the job.