I doubt side project is the right thing at this point in time, unless it is something you can complete in a day. It looks like the OP needs to be away from his

I doubt side project is the right thing at this point in time, unless it is something you can complete in a day. It looks like the OP needs to be away from his computer and side projects that don't work out can be more frustrating than your daily job and may cause OP to spiral further into depression.