You'll probably come across advice you've already figured out on your own, but there is a wealth of information for even experienced musicians.
> Learn to play a few simple songs that you like, using 3-4 simple chords (there are a ton of tutorials for that), and then spend 1,000 hours playing around on the vicinity of that musical environment.
I would fundamentally disagree. I picked up guitar 12 months ago, and while I couldn't play you a single cover song, I have written over a hundred fleshed out songs. My practice time and creative time were intertwined, and I let my practice sessions inspire my songwriting and vice versa.
It created a clear path of progression for me, and through learning about and writing dozens of different genres I successfully brute-forced my songwriting skills into maturity. I didn't get locked into any particular style as to not limit myself; I intentionally didn't learn 12-bar blues, for example, until about two months ago. I'm not boxed into referring to the Circle of Fifths every time I write a progression.
I still have a long way to go, for sure, but my fundamentals are solid, cohesive, and broad instead of defined by a narrow perspective of playing three-chord songs for 1000 hours. I have written a hundred songs and am preparing to gig, while my friends who have been playing guitar for 10+ years are still struggling to write their first full original song.