that’s fantastic!! for the media you still consume (youtube, Lemmy, etc.), avoid negative/angry/drama-driven communities and content. focus on positive things you really enjoy, like your hobbies, animals, uplifting news etc.
back when i still used reddit i cut out subreddits like antiwork and mildly infuriating and subbed to scrungy cats and things like that. my feed was so much brighter and it really made a different to my mental state and attitude!
uBlock Origin on Firefox still works great if you keep the filters up to date every once in a while c: