I've been playing for 9 years but I don't practice technique much. I've always just wanted to PLAY, and that generally works for me.
This approach has brought you "blisters, sore fingers, a broken knuckle..."
If that's "generally work(ing) for you" then carry on with your method. If not, seek another.
I'm game for some simple techniques I can be mindful of if you have any specific links.
Having good technique is quite simple. There is, however, a long and sometimes difficult road to obtain it. A couple of "links" aren't what you need. Get professional help.
I'm not opposed to "practice" practice as long as it's something I can work into my increasingly rare opportunities to play at home outside of band practice.
So, you're not opposed to doing the necessary work to improve your technique as long as you don't really have to put much time or effort into it.
Enjoy your blisters, sore fingers and broken knuckles.