[sureklix]

Old school advice but worked really well in my previous startup –(i) conferences and (ii) snow-ball interviewing.

(i) In your case you need to somehow find this high density potential early user in-person gatherings. You can for instance hang out in a non-generic co-working space where you know it is the choice for digital nomads etc. in your city.

(ii) This is somewhat under-rated but you really can crawl the network of people you know ad infinitum. You only need few people you know who are productivity obsessed to start with. And then always ask them "who should I chat for 15 mins. to get feedback on this etc. (I would suggest crafting this ask really well so that it doesn't come off as demanding. Try to genuinely give value at every interaction, that's how I enjoyed the process as a hardcore introvert.). I spoke to about 5-10 people every week and ended up with a decent community of early users in <3 months.