I used to play and I still have an acoustic 12-string in a case in a closet, but I doubt I would find much relaxation or anything very soothing from playing it again. I used to spend a lot of time learning chords and new songs so I could play and sing along with other people, but I actually found the bass much easier to play and even more enjoyable whether alone or with others. Music certainly can be relaxing, but not for me when producing it requires so much concentration and actual work.