I appreciate your concern for the quality of your contributions, and I think this place has a higher proportion of that type of user than just about any other platform.
This place is small and it’s generally friendly and inclusive. Most comments won’t get any replies, but the ones that do will generally be constructive. The users here are into the whole idea of the social contract and that we can have something nice if we are just excellent to one another.
I repeatedly say “generally” because this is an open platform and assholes are allowed to join. The assholes can even have their own instance dedicated to asshole topics! But fortunately the instances and communities are generally moderated by actual decent humans who are much like the users!
So let that knowledge help you comment more, not less! Even if you get no comments and like 5 upvotes, it actually feels like something of value even if it’s just a nod from a few decent people.