I have been the the complete abyss of creating muscular skeletal issues for myself. If you really don't want to mess around I think swimming is the way to go. Couple with curcumin / boswellia / magnesium to take the edge off. If you really nail down the exercise / nutrition etc you can slowly but surely reverse these varieties of problems (personal experience)
Seconding swimming, just make sure you have good form. Also, if you’re having musculoskeletal issues, maybe pick a couple different activities and do them in rotation. Diversity in workouts is good if your objective is to stay healthy/generally strong as opposed to having a particular physique or because you want to excel at a sport.
> If you really don't want to mess around I think swimming is the way to go.
I have been plauged by muscular/ligament issues too. I tried swimming and ended up hurting my rotator cuff, now I can't do repetitive overhead activities :\.