I have a weird suggestion: work out high. Nothing intense - a walk or some floor exercises would be good. Go very easy for a couple of weeks at least.

When i was super depressed it was so hard to get started that working out high was just easier. Eventually, the exercise became more important and i even started to play some sports. Pretty quickly i was exercising more than getting high. These days, i refrain from smoking weed so that i can do better in the leagues i eventually joined.

Bonus: through the leagues i met some nice people.