Hey guys.Well i made the mistake of joinng the DB with a character i was trying to roleplay that is generally good (I joined them but didnt do any quests for them) I was just wondering if theres any console command to make like i never joined,like remove my allegiance with them but still have them joinable if i decide to do it later?

There is no console command for that. Just ignore the quests. Be careful though, since it seems to be impossible, seeing as how many people on these forums whine about it. Seriously, just ignore the quest.