Doing nothing doesn’t get boring for everyone. And it’s my time not yours so who’s to say what a waste is?
My biggest advice is to do what you want and don’t feel like you have to live up to some HN-gap-year fantasy. You might regret sitting in your apartment surfing the internet (I didnt) but you might also regret traveling. It’s your time. Do what you want.
You didn't do nothing for 3 years. You enjoyed your time, and you did things, so no, you did not waste it.
Otherwise I very strongly agree with, that you just should do, what you really want and not what others want.
After I decided to leave university, I planned a bike trip from germany to portugal. I wanted to do this. And I did it. But then, along the way, on the border to spain, at a nice place I stayed for a while ... I decided I had enough. Or I realized, that I had wanted this for a while already.
It was fun, but "accomplishing" my trip would have only meaning for my travel blog and the expectations of other people - but not for me.
I enjoyed the trip very much, but did not felt like moving further and spend the whole winter in the south. So screw other peoples expecations, I am doing what I want, so I flew back home.
I wasn’t wealthy in the HN sense though. This was 2010-2013 and my rent for a tiny studio apartment was $550 a month. Other major expenses were just internet (50 a month), groceries (few hundred a month), gym (35 a month) and electricity (20 a month). No cell phone. No car.
For the 5 years leading up to that I was working full time during the day and doing freelance SEO writing side. Was able to save quite a bit. But I was really fortunate to be in the right time/place. Rent in my city had basically doubled (and then some) since then, for example.
Bonus points, if you have all your stuff packed somewhere and not have to pay any rent. But it depends what you want, if you like your home, keep it. Have projects in your home ...
There are lots of things to be done. Doing nothing is also fine for a while, but gets booring very soon and puts you in lethargic state ... wasting your time.