If there are any rules you're confused about, feel free to ask me or any other active staff member about it. We'd be happy to explain them to you if you're unsure. I guarantee you there's a good reason behind every rule we enforce; we don't make them up for no reason! Most of the ones you broke just come down to the purpose of the RMT section, which I'm sure Qwerty just made a bit clearer for you. I'm certainly not going to ban you for simply making a mistake like that. That's ridiculous.
With reccomendations on how to get the basics down, check out our Pokemon Showdown server (
http://pokemondatabase.psim.us). Scillet already linked the site below so I assume you're familiar with it? There might be some people there who'll help you out. If not, check out this thread.
http://pokemondb.net/pokebase/238563/how-to-get-into-pokemon-competitve-battling I posted an answer there for a person who'd never played competitve before at all, but the stuff there should still cover a lot of the stuff you want to know.
With the question you made about opinions, what did you mean by that exactly? If you're talking about the rule about no polls, once again it's about the site's purpose. Opinionated posts like polls don't have a correct answer, so they're not suited to a Q&A format like the one used here. There might be a separate forum in the future that'll allow open-ended posts like that.
As for your team, it seems someone's already been in before me and approved it. It should be there now. Good luck :)