Welcome to the forums and good luck!
I would suggest that all relationships - regardless of online or off are all incredibly different and both have unique experiences. Online is to offline is no exception and there are big differences. For one thing, you have mannerisms to take cues from when face to face - this assists with any relationship and adds a bonus to communication. That said, alot can be said for the written word and something that Darcy and I both do is still write to each other (even if it's just a text or short missive) - even when we are in the same house.
Plus there is then the tactile aspect that offline relationships allow. You will need to start to learn skills for example say - if bondage is your thing - attending workshops is a great way to do this. Start reading books - there are some great ones out there. Don't get distracted by online websites where you don't actually get to see the people who are involved with it... Personally, I find them way too overbearing and pretentious (haha - and that's coming from me![:D]) Try more active community sites.
My suggestion is that you get out to groups and a munch (I do not know your level of knowledge and all these terms may be confusing or you - so I apologise if I am speaking gobbldegook) - you are in CA? There are people here that can point you in the right direction - and just be yourself.
From my personal POV - I would suggest you be careful of people who tell you there is only one true way, 'true' dominants and submissives, those who completely deny that 'vanilla' life is involved, and those that identify as 'real'. Be honest with yourself and what you desire, don't settle and be careful of the frenzy of the first steps of walking into 'realtime'. Be patient and don't be discouraged by negative responses or advice because you can even learn from that.
Reading this forum is a good start - ask lots and lots of questions and don't be afraid to ask. Yes, some people will judge, but you will get that anywhere. And just be patient and slow... however frustrating that can be at times.
Enjoy, learn and good luck!
Peace and Rapture