Trying to become a mod is a good goal for any member. If nothing else it will help you improve yourself.
As for typing/grammar and stuff, it can be as simple as capitalizing your sentences, punctuating, not using shorthand like 'u' instead of 'you', and so on. It's not crucial, it's just nice to come across as though you aren't too lazy to type things out and stuff. :]
Everyone has a chance.