I don't know if this has ever been answered. I've done a little searching on the forums and couldn't find anything, maybe just missed something but anyways

I've been watching guitar videos on youtube lately and some of them say that they learned guitar using a specific software. I got my first debit card yesterday in the mail, got some money in there, and was wondering what's a more-bang-for-buck software that a beginner (such as myself) should look into? Should I even look into a software or should I continue trying to self-teach?

Thanks for the help.