If you want to start an MMO Rauno, go for one that is newish. Hopping into an MMO full of pre-set community rules/standards with years behind it will simply make you feel out of place and it will be more difficult for you to fit in at the end-game, not to mention if it's something like WoW, you have many expansions to buy.
My suggestion? Play some free MMORPG's (there are quite a few really good ones out there I can list for you if needed), until something like Guild Wars 2 comes out, which is looking to be an impressive MMO and will be new, so everyone (and you) start on the same knowledge level and ability.
“Anna, my strong, terrifying Anna.” -Cas
"You lack the requisite spine and testicular fortitude to study under me" -Elodin