Lol don't worry so much, these boards are for the lolz, we don't usually bite
although some ppl can be jerks, they're just jerks.
There is a
lot of information/terminology about brawl, you could spend a long time reading it, so be prepared. The starting place for your journey is here:
[
Thread of links to important threads]
Some of the linked articles are IMO junk, some are probably what you're looking for (definitions of terminology, tips for getting competitive, etc.), some are just insanely detailed scientific approaches to figuring out the internals of Brawl's engine and how it relates to subtle aspects of gameplay.
When I started out here, I read through many guides and a lot of info that I didn't understand, but eventually helped me sort things out in my head
So just slog through it as long as you're still amused by this silly game.