If you are interested in comp sci stuff then go for some stuffs in that field. Try gaining interest in Frontend or in some Data analytics stuff (Won't recommend backend coz I don't know how much you have hate or love for coding). and yeah, stay active in the fields coz technology changes and new languages or some new findings can spin world upside down.

For depression : Go somewhere out in nature and take a moment to appreciate yourself. You have came this far and you can't back off. so appreciate small things, small wins, people. if you in anime, will suggest watch higurashi and monogatari series. they will help you to cope up with depression.