For me personally, I have less connection to specific subs than back in the reddit days, given its federated nature and all that. I enjoy scrolling through the homepage, but don't really have that specific moment of 'I thought of something nice! That would fit nicely into this one, specific subreddit!'
Which, don't get me wrong, can be a good thing in the long run. But it takes a bit of getting used to.
Good luck on your journey! Therapy is expensive and it can take a while until you find the right therapist. But it will be worth it, trust me.