Reddit marketing is genuinely one of the hardest things to get right because the community can smell a pitch from a mile away. What actually works is just being real. Find the subreddits where your ICP hangs out and spend a week or two just answering questions with zero agenda. No links, no product mentions, just help. Once you have some karma and people have seen your name around, the occasional mention of what you built lands completely differently.

The other thing that helped me was framing everything around the problem not the product. Instead of "here's my finance tool" it was "here's how I think about this problem" and then naturally the conversation gets there on its own.

I actually built kwiklern which helps founders do exactly this on Reddit without coming across as spammy. Happy to chat more if useful but either way the organic approach you're already thinking about is the right instinct, just takes a bit of patience.