If I had a guild I'd have paid for your transfer to my server. Well, not really, but you sound like you'd be a good member of any decent raid team, just from your attitude, and it's a shame the guild you've joined is keeping you on the sideline.
Now, from my experiences if the guild doesn't want you in, you'd be better off finding a new home.
If that's not an option for you, I'm not sure how hardcore this guild is, but I have friends who did join top guilds, and they were usually sidelined for a few weeks before they were accepted into the guild as "real" members.
Always strive for perfection, but realise you'll never reach it.