Happy you can work on it full time.
I really like the idea! Keep up the good work :)
2 months of that (part time) was the initial build and the rest was hustling to get initial users. GitHub wouldn't put it in the GitHub Marketplace (which drives pretty much all signups now - I don't do any marketing or sales) until it had 250 users and it was a struggle getting the word out to that many people. In the end I did it by commenting on relevant open source PRs on GitHub asking if they'd be up for giving it a try (being really careful not to be spammy).