I'm completely new to these forums, and to role playing in general. What should I do to get started?
1. Be observant and ask questions - Learn from your fellow peers about how things go around here as well as using your own logic and understanding. Ask around if you feel something is unclear. Most people should be friendly enough to answer them.
2. Don't be one of "Those Guys" - You know those people who just ruin your day because they are inconsiderate jerks who do not care about others and seem to subconsciously block out any form of logic you present to them? Yes, those guys. Don't be like those guys. Please. You will make the world a slightly better place by avoiding that. Be friendly to people and they'll be friendly to you too (most of the time). If they're not, just try to avoid interacting with people who don't seem like good company and find those who you enjoy spending time and roleplaying with.
3. Don't respond too negatively to criticism. And by criticism I mean the constructive one that is sensible and logically founded. Not the random insults people throw for the sake of insulting. If someone criticizes the way you write, try not to take it too harshly. Chances are these people just want to help you improve. OF course, sometimes criticism is based on personal opinion. So I'm not telling you to just comply with everything everyone says. Instead, just keep their comments in mind and decide for yourself if they have a good point or not. And adjust your style accordingly.
And lastly:
4. Have fun! The point of roleplaying is to enjoy yourself in fantastic new worlds created by everyone on the site (yes that includes you!). Join in with some good people and go on an adventure that you will all have a blast with.
Once again, welcome to the site, and I hope to see you around!