How can I make this approach more concrete?

Hey folks, My process for writing helpful content has always been to look up what people frequently ask on subreddits and then write a blog post about it. Last year I tried this approach and one of my articles made it to position #1 on google and brings in a healthy level of monthly traffic. Albeit not from a region I’d expected but traffic nonetheless. I did this a little haphazardly. I’m wondering if there’s a way to be more proactive about this where I can gauge if there’s decent volume from certain keywords found in Reddit posts. The good thing about this approach is that since Reddit posts have context it’s much easier to write something helpful. If I can be more deliberate with how search might pick it up then I’d solve a huge part of driving traffic to my blog which is discovery. Would love your help!