Also to add on to Hooli's statement. Don't be afraid to add silent thoughts your character may have, even adding in random things can spark a good role play. If you're in a role play where nothing's happening. Make something up that's harmless. Not everyone enjoys drama all the time, and certainly the leaders won't like dealing with it. However, a harmless hyper streak of your character running around like a nut and jumping over people can be enough to get at least a reaction out of everyone.
Also, if you don't know a spelling to a word, it is okay to not look it up and just post it. If someone knows they'll correct you so you know for the next time.
Role play is supposed to be about the creativity that you can pour into each character you have, so have fun with it. Even when your character suffers, if you feel for your character and others are too, then you know you've done an amazing job with them.