sometimes, i also want to do something like that, but i don't really understand by making app. sometimes i try to find a job on the internet, and get some that pay using crypto, and it is really satisfying indeed. in fact, when we are paid from a signature or bounty using bitcoin, it is very satisfying. congrats to you for making things run smoothly.
You cannot just find a job and work on it if you are not skilled on it. For me, it will be more satisfying if you can give your best in a job because you put your whole passion in it, and you can expect that your work deserves a good compensation too. Having paid in bitcoin is only a bonus. If you can extend your skill into creating another skills that will still suit on you, that will do more good on you. The more skills you have, the bigger chances you'll earn good amount in bitcoin.