Not too bad for a 12 year old. The 50 metre time seems a bit off if you ask me. Check to see you wrote down the right number.
I'm well past my prime, but ... most of these times were run in 85/86 when I was 17/18.. the 800m was when I was 31.
60m 6.81
100m 10.63
200m 21.9
400m 49.3
800m 1:59.6