How do I use LinkedIn efficiently without going insane?

So I'm in the tech field and I want to use LinkedIn to build my network and increase the probability of me finding good jobs or useful connections for my career.

I am also someone who is off every other social media site because their impact on my mental health is really bad. I am vulnerable to social comparison and the addictive parts of social media. And I have had to deal with that in the past with LinkedIn.

And, between my job, other ways of improving my career prospects, and the rest of my life, I want to make sure I'm getting the most bang for my buck, time-wise, when using LinkedIn.

So I want to make use of LinkedIn without getting pulled into the stuff that will just degrade my mental health or waste my time. But it's not clear to me how to do that. Maintaining my profile and keeping my inbox open for DMs seems like no-brainers, but then there are other parts I'm not sure

  1. Should I ever post on LinkedIn? Thoughts, career updates, articles? I'm early-midlevel in my career and certainly don't have the appetite for influencer-type posting. Do these raise my profile or just waste my time and leave me feeling awkward?
  2. Should I curate and monitor my feed? Am I likely to find useful opportunities or good career info just by regularly scanning a well-maintained feed? And if so, how often is useful?
  3. Should I use it to reach out to people in my field, even if I'm not directly connected with them?

Questions like that. Basically, how do I make use of LinkedIn so that it works for me, rather than me working for LinkedIn?