My foot fetish got taken out of hand in the past few years

I used to be very obsessed with feet when I was 13-17 (gay male), I’m 18 now (still into them but keeping to myself now and trying to avoid causing damage to others), I had honestly taken a lot of pictures of feet without people’s knowledge and licked/ sniffed various peoples sleeping feet without consent, (also lots of online feet pics of like 11-22 yo) nothing further than that though because I didn’t want to go too far, and I believe that none have been aware or have cared about it so far), nothing was in malice or in bad thoughts, I feel like an absolute monster and a train wreck of regret and disappointment/depression, I know I did wrong and feel like I’ve been trying to get better despite challenges and am currently working to apologize to those I’ve wronged, I do not necessarily think I need therapy as of now, but what are some further steps I can take to improve in the future and to move on?