So I am trying out for a play and I want to try out for either Kelli/Katie. Kelli is a ballerina but I would also get to play Katie. Katie is the main character's little sister and a math whiz. I could also try out for Edwina, the main character, but I am a little scared.

Go for Edwina

Explanation:

You will never know until you try, not trying to sound corny,

But go for it...

Katie

Explanation:

I think you should get Katie because she is a simple character. Since, you are worried try out for a simple character.

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.