Restart World Of Chel?

You could straight up delete your profile data for chel but it there is a way to directly change builds

Chel

Cutomize

Edit Loadouts>Skater

(Click on the build you want to change) *Select*

Scroll down and then left or right to select height/weight.

My 5'6 169 sniper has the highest ratio of skating and shot abilities of all builds and I couldn't recommend it more, you just need to learn how to bounce off hit attempts. Good luck with whatever you choose.