I don't know if I have any great advice - it mostly took me time and space to heal - so patience and grit helped me most. Seeking a sense of connection to those who've experienced similar can help of course, too. There'll likely come times when you feel like you're bottoming out and its important to not use to try to pull yourself out of it. Gradually, people in my life looked at me like I was me again, and some of my closest friends never treated me any differently. Months later, someone might ask me how I was with an emphatic, concerned expression and it would annoy me since I just wanted to move on but I'd learn to let it go and recognize it as love and not pity.
Leading up to my spiraling out, substances (weed and booze in addition to the psychedelics) creeped their way into being the highlight in my life and I'd cycle them to avoid feeling like any given one of them was a problem. On the surface my life looked good - career, travel, hobbies, etc. - but I felt empty most of the time and nothing felt as compelling as getting blasted. I'm not sober but I dialed it way back and abstain from everything for long periods of time. I found Gabor Mate's talks/interviews on addiction on Youtube helpful as well as the book Running on Empty by Dr. Jonice Webb.