New to Rpol, NEVER EVER played in my life D&D
What Hitomi said. Be open to new experiences, and realize that one DM's D&D is not like another's. If you can do that, you'll do fine.
I'll add some general RPoL-related advice:
RPoL injects another layer between you and the rules: it's a play-by-post environment. Look for some streamlining to occur to facilitate the slower pace of the medium. Speaking of pacing, it's one thing folks debate here with regularity. Some games post quite fast (more than once a day) while others may go quite slower. Find what works for your life and schedule. Be sure to discuss that up-front in a Request to Join (RTJ) when you want to join a game.
Get to know the place: Hang out in Community Chat (now that you've lined up, signed up, and re-enlisted today) and get a feel for how things go.
Do please read the Notices in each forum you visit, as they will spell out the how of things - the rules we all live by while being there. All forums on RPoL are moderated, and have definite etiquette and culture associated with them.
While you're hanging out, check out the Help and FAQ topics (in the links at upper right), too. Lots of good info in there about how to run a game of your own, how to use the unique-to-RPoL tools, and how to comply with site-wide policies. Pay particular attention to policies regarding duplicate accounts, and mature & adult content.
When you're ready to find a game, look in Wanted - Players and Wanted - GMs. These are advertising boards with some special rules that allow GMs to advertise for players for existing games, and allow Players to advertise for a GM to run a game they'd want to play.
Another place to find games as they are just starting up is Game Proposals, Input, and Advice (aka GPIA) . Among its other functions, this forum allows prospective GMs to float proposals for games they are considering. This gives them a feel for the interest level for their proposal before they do all the work involved in putting a game together. Expressing interest is a great way to get a seat at the virtual table as a game is just starting.
GPIA is also a place for GMs and Players alike to solicit input and advice on game-related problems or questions. Take a peek and you'll see what I mean.
Don't be afraid of asking questions, 'cause folks here will pitch in to help you out when you do. With as many games as are going on right now, you should find something that's a good fit for you, and that you can enjoy.
Now... get out there and get you some!