Re: I'm new to role playing. Please Help
Hello Landon and welcome to our community. Make sure you read the FAQs so you know the rules and customs, but don't fear the moderators, they're here to make things run smoothly.
Roleplaying in essence is exactly what Nazid said, assuming a character appropriate to the setting and describing the character's actions. Around a table, it's done verbally, but here we do it in written posts. In free-form games that's all there is to it. The outcome of each player character's actions is determined by the GM or sometimes by consensus.
Formalized game mechanics can be very simple or very complicated, but mostly somewhere between. There are dozens of different rule sets or systems, each with its own ins and outs. Most are available for purchase in pdf form and many have free sets of rules, often just the basics, but sometimes an entire book. Some systems require just a single book, others have dozens. Some exist in a single edition, others have had successive iterations. Many have a basic set of rules with many supplements for various settings. Sometimes GMs are willing to instruct you from their own set, but it's usually good to have your own.
Every game on Rpol is run by a GM (or two or more) and it is up to the GM whether you are accepted into a game. This is achieved by the RtJ (Request to Join) process, which is different for every game. You need to find a game or two that looks like fun and follow the GM's RtJ to try to get on board.
Have fun!