Earlier quoted context omitted.
What do you want to spend your time on other than the internet? I don't know what you've tried, but you've talked about what you don't want to do, and didn't talk about what you do want to do. And it's hard to remove a habit if you don't have something ready with which to replace it.
I agree. Rather than trying to focus on not doing the thing you want to do in a sea of few options, one needs to develop new patterns. Go travel, visit some friends overnight, go camping, anything to get out of the house and create new (or at least different) experiences and a bunch of simple-but-different problems you need to solve. When you're done and get back home, you can reintegrate to the Internet, catch up, a…
I feel compelled to also add that while it seems well-meant, I think the tone of your last paragraph is a bit unproductive. A lot (most? all?) of us, at some point, fall out of the habit of exercising our senses of curiosity and wonder and trying new things. This can be caused by many combinations of family, economic, and social conditions, or for some, because of chemistry (ie “serious depression”). Therapy is indeed a good way to develop the skills to work against this and identify whether it’s actually a chemical problem in need of a chemical solution. But it doesn’t help to go straight to calling this “serious depression” needing “professional help.” Literally all of us can benefit from therapy, and making it out to be a big deal and putting labels on people makes many less likely to pursue it.