Definitely not too late for cheer, especially if you're looking at All-Star. You can compete at any age and level with people at your age and level. If you're 13, you would probably be put on a Junior 1 or Senior 1 team if the gym offers that.
Gymnastics I couldn't really tell you.
No its not too late. If you have to want to start cheerleading or gymnastics now you can start. Don't lose your hope and never give up to your inner want.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.