Noahaha
blindmod
Welcome to the forum!
If your times are that erratic, you might want to do some slow solves and figure out where your solves are going wrong. Get more comfortable with F2L, and try to work on look ahead.
The only real way to learn cross on bottom is to start solving the cross on bottom.
Also, there's an accomplishment thread that would be a better place for you to post future PBs, but this can count as your introduction to the forum.

If your times are that erratic, you might want to do some slow solves and figure out where your solves are going wrong. Get more comfortable with F2L, and try to work on look ahead.
The only real way to learn cross on bottom is to start solving the cross on bottom.
Also, there's an accomplishment thread that would be a better place for you to post future PBs, but this can count as your introduction to the forum.