How good do you have to be to participate in a contest? I think I am pretty good but not good enough to compete. What kind of tricks should you be able to do take part in a competition?
Well there are many different contest search around.
They go all the way up from beginner to pro 
There are some contest that have a division for beginner…
If you think that you are ready for a contest, then join one…
Joining contest doesn’t mean that you have to be good or have to win…
But to have fun and gain some experience…
Good enough to pass prelims.