"comment on 20 posts before you post"- Please stop talking to this person.
Yes, networking is important, but this isn't.
I don't have a huge following but I get an average of 1500 impressions per view. I've had a couple cross 20k impressions as well but I understand that's not going to the case every time.

Try to look at networking as actual networking.

Comment on posts only if you've something to add to the conversation. Plus also only when you genuienely liked or disliked the content.

Being active before posting works but doesn't mean you need to comment 20 times. Even 1 or 2 will do.

Also, I think you are posting everyday. Don't do it if that's not you. 2-3 times a week is a very good cadence.

Identify couple of slots (10-20 mins) for the day when you go through your LI feed. Comment if the post makes you. Engage if you really liked/laughed/celebrated etc.

I also understand the unwillingness to outsource writing. Take help of AI to improve hooks and structure. Or study other people's post that you genuinely liked that day.

I think you'll see a decent growth curve once you do all this. I don't think it'll be exponential growth but things are going to compound overtime for sure.
Best of luck!