You can't predict the future and you never know what will happen.
People get discouraged from keeping trying different things if one or two won't work for them.
Especially if they are in a constantly discouraged, depressed state.
Every of the things you said are normally good and for that reason, should be tested out.
OP should; That's my opinion.
Like when you said hanging around people makes it worse for you, is also revealing it obvious that social interaction can be a very important a factor in this.
Even though "exposure" as psychological ailment is pretty much the mainstream idea of things, it can also not work, in which case, usually the opposite, limiting exposure works. That is something for everyone individually to try. When an impulse arises into the direction of giving it a try. One can see the glass as half full or empty, but that it should be tried doesn't change.
Anyways, the first preferable option to treat depression should be therapy.
All those options are either easy to deal with don't require a lot of effort and don't cost a lot. They are also not as promising concerning getting real tangible results. They offer a good chance. The majority of afflicted people at least feel "better" doing each one of those things.