Finding the right way to acquire customers

Happy holidays entrepreneurs! I recently hit the first 7 customers (5 paying, 2 are still in trial) for my startup Affistash, but I am still pretty unsure, because everything moving forward seems pretty foggy for me. I currently have 170 users, but I don't want to seem spammy trying to convert them through popups and emails... My startup: https://affistash.com I feel like I can't develop a strong customer acquisition channel, since I am not experienced in marketing. Even the fact that me and my co-founder managed to get 5 b2c paying customers and 2 b2b customers in the first 10 days since our startup launch day on ProductHunt feels pretty insane, because we didn't focus specifically on any channel. In the end, I am just looking for some advice from anyone that has managed to master this skill, in their entrepreneurial journey. Do you have any suggestions? Thanks and I hope you guys have the best holidays with your loved ones! 🎄