Actually coming back to the thread to share my own experience... is that I haven't played guitar for around the past 10 years, since I started college. I still have all my gear, and just this week I picked it back up, and it felt so good to play again. But most of my muscle memory and finger strenght is gone and I don't remember how to play most songs that I played back in the day. I spent most of my teenage years playing a couple hours a day, but now I feel like a beginner again. So, I'll say, try doing some exercises as warmups, then go practice the songs that you want to play. At least that's what I plan on doing.