Look into self-hosting. Start small with only one or two services that have a big impact on your privacy (e.g., backup of your phone's pics with Immich) and expand from there once you gained some experience. Things will go wrong, expecially in the beginning. So set up encrypted backups, I use Kopia for that, one repository on an external SSD and another on Backblaze.

I'm used to being alone due to difficulties socializing and having moved multiple times. I will turn 31 later this year.

Short term I would suggest you going to cafes or other similar places in the weekends. Even if you end up not interacting with people, having them around already helps in itself. Plus, you might actually end up interacting with someone.

To get out of the bad mood, you can also try to call a relative on the phone, I found this to be helpful many times in the moment, but not always.

Personally, especially now that the weather is getting warm where I am, I often go out for walks or runs while listening to podcasts. But beware that using headphones all the time makes it harder to interact with others.

More long term, I would advice looking for a job where you show up in person, so that you get to interact with your coworkers.

I would also suggest talking about this with your psychiatrist, to get some advice that is more tailored to you. One last thing. While I'm not a doctor and this definitely isn't medical advice, I heard about studies showing that physical exercise is as effective as certain anti-depressants. You could discuss this with your doctor as well, as if it works for you, it has more benefits and less side effects than pills. Additionally, if you join some sport class that could be another way to meet people.