I do however recomend getting a good one on one instructer as soon as you have the means, cuz they teach you the small unobvious things like propper posture, picking techniques, covering strings and give you priorities for what to learn first...I mean there are twenty million different things you can learn on the web, but what should you start with? A good instructer will also nip "bad habits" in the bud.
The lessons should be 3-5 months depending on you, and if you know people in bands or on the music scene in ur area, find out from them who's a good instructer...cuz it's probably somebody that taught them.
Three other quick things to ponder...1) after the lessons are over, ur probably going to have a good friend that u can call anytime you have questions, cuz it's in their interest for their student to be great! (unless their a real ah) 2) Find someone that appeals to the music you want to play and makes class interesting...for instance my instructer would spend an hour of actual learning, then show me videos of steve vai, and malmsteen to get the point across about techniques...and then teach me a pantera song cuz he knew thats what I liked. FIND THE RIGHT PERSON...don't go for some old school classical instructer that's going to teach you one chord for the day over and over again and thanks for the $30.00. 3) when the lessons are over u'll know a heck of alot, but ur still going to be NOWHERE near what u want to be...takes time and lotz of practice (as Im finding out)..unless ur a prodigy..then hey more power to you!!!!