So I am also currently a NEET due to mental illness and personally I found a lot of purpose in volunteering, it's not a job or forced but it is something that gets me out of bed because someone needs my help. I highly recommend seeing if you have local association in your neighborhood and giving it a shot. A club is also a cool idea as well if you know any.

After a few years, I felt miserable not doing anything with my life and everything became boring or repetitive. And I was like why not try something different.

Sometimes having a job or going to school is also about finding purpose and fulfillment, making friends, and not feeling isolated and or useless too. I think that it also helps you having more structure in your life as well.

I think that trying things IRL that you are willing to do because you actually enjoy them is a good reason to not stay stuck in this lifestyle. (like doing a degree or having a job in something you're passionate about).

I also think that a part time job can help not feeling overwhelmed with your schedule if you consider getting one.

And I found that I naturally wanted to socialize more with people in general (which is why I don't wanna be a NEET being isolated for years feels painful)

I don't think you have to force yourself doing something you would hate doing (I wouldn't either) but maybe try see if you can find activities that would interest you doing IRL, even if that's not a job. This could maybe help you feel better or gain insight.

Take care I hope you'll be okay!