I'm trying to unlearn some bad habits acquired many years ago. Never got good at playing scales and notes. Now when I practice, I try to follow the video and observe which fingers are being used for which strings on which frets. But I'm wondering if there are rules or guidelines for which fingers to use when playing individual notes or doing scales. I try to engage the finger that is physically closest to the string/fret I'm playing, but sometimes that doesn't feel natural. Thoughts and suggestions.

Thanks,,,btw I just dragged out my 50 year old Gibson B-25 after having it hidden in the closet for 4 years. Had it restrung and setup. Truly enjoying my reunion with my old friend.