Old skool, listening to CDs, learning stuff I liked. I had a Technics CD play with an AB loop function which I more or less wore out.
Later on when doing my acoustic gigs I was one of the first to use a loop pedal, which replaced the AB loop on the CD player and could even slow stuff down. Playing acoustic gigs solo is a great way to improve. I used the looper on a couple of tracks, but the majority was just me, playing stuff like GnRs or Bon Jovi and singing, with no place to hide the mistakes it soon makes them very few and far between. Also makes playing in a band seem easy when you have other instruments playing.
That brings me to playing with great musicians and those that are a level above you, that really brought my playing along. Playing in front of an audience at a decent volume. Nothing like that to tidy up sloppy playing like unmuted strings or poor dynamics. It’s so different from playing alone in your safe practice space at low volume.
I took a couple of lessons when I first picked up a guitar about 40 years ago from a couple of different teachers but unfortunately they seemed more keen on showing off their awesome shredding abilities rather than teaching which just demoralised me further early on, which is why I learnt a lot of stuff on my own.
One of the biggest things I wanted was to learn loads and loads of songs from mainly rock and blues.
I had a Learn Rhythm Guitar book by Burt Weedon I think it was. That was a very good foundation as well.
Having got back into playing in the last couple of years after ill health prevented me from gigging and I realised playing at home for my own pleasure is better than not playing at all I have signed up to an online masterclass which is better than I thought it would be and I have learnt a couple of techniques and riffs that I have been able to take over to the solos of my favourite songs giving them a fresh sound.
sorry for the muddled post but this kind of came out of my jumbled brain straight onto the page without me planning it out.
Just play something new everyday, be it a new chord or a new riff or learn a new scale in a different position but just play, and don’t forget to warm up, tendonitis is a *****!