What is the best description if the connotative meanint lf the word immature is in the sentence

Okay this isn't a full answer, for me to answer the question you will have to put the sentence. I will do my best to answer the correctly when you have the full sentence.

is this like what i see in person? or do you have option?

jessica, a teenage girl who just wants popularity, does everything to get attention. she puts her hair in a bun and steals her mom's lipstick and such. but then she takes something and it makes her inside and outside appearance  go bad.

i just came up with that in less than 60 seconds, but tweak it up if you like it.

explanation:

you didn't give a theme but i did a question like this a while ago so i hope this is what you were looking for.