Ok so I'm thinking about going and seeing an LGBT person soon.

I think they're referring to a therapist with a specialty in LGBT issues. It isn't clear when you say you're going to see an "LGBT person" but I think you mean a therapist.

If you haven't been to a therapist before, it's really no different than going to talk to someone about the issues you're having... similar to discussions you've had in threads here, or via PM with me. A good therapist will listen and then offer you different interpretations of your experiences and help you understand when maybe you're experiencing something through the filters of experiences you've had, if that makes sense.

Basically, a therapist helps you to understand yourself better, let go of the unhealthy thoughts/ideas/behaviors and adopt new, healthier ones.

Now... if you're talking about an LGBT center, such as a GSA club at a college, or a community-based gay center... that's a completely different thing. Some are primarily social gatherings to meet, hang out with, and do things together with other LGBT people. Some are full-service community centers that offer therapy and counseling, support groups, social groups, parties, activities, and the like. In Vancouver, I'm guessing there is probably a pretty large LGBT center and probably separate ones associated with the universities there.