the problem with teaching yourself guitar (or any instrument) is that alot of people give up they get frustrated. (supposedly 90% of self taught musicians quit)
also alot of people can ”play” guitar, ie bang out a few songs & intros eg starirway to heaven.
guitarists are a dime a dozen, everybody plays guitar (heck i play guitar) however a decent guitarist is hard to find this is where you can benifit from lessons.

Lessons are definitely a great idea, a teacher can show you techniques & correct you. i still get corrected over things i do at my lessons.
alot of the internet resources aren’t that great, again it is alot of amateurs with bad technique or looking to make a quick buck.

every music autobiography i have read (& i read quite a fair bit of them) the guitarist/any instrument, has gotten lessons at some point.
there are a rare few virtuoso (ie talented) people who didn’t get lessons but even at that they start practicing with other people who have got lessons & learn off them.
As somebody said those ”guitar for dummies” are great, however that is as a side tool to reference to. not to just teach yourself, at a glance you learn the basics but when you study those books they can get quite complicated & a teacher can clear any questions you have.
a teacher also encourages you to practice & gives you set goals.

PS try not to ask people to give you the chords to a song, its better if you can work them out yourself it creates an ear for certain notes. however make sure what you are playing is correct.
References :
irish bass player