Starting a business is hard work

Frontend dev: hard.
Backend dev: hard.
Language design: hard.
Writing docs: hard.
HTML/CSS: hard.
UI design: hard.
Marketing: hard.
User support: hard.
Finances: hard.

It's all hard. Each one of these is an endless rabbit hole. Getting into starting a business alone requires a ton of fast learning in various fields, some of them are not even remotely connected, like backend dev and finances.
If you ever think that you won't make it, everything you do is a failure, remember: this is not a competition and you already did a really solid piece of work. Don't look at those founders with thousands of $$$ in MRR who already digged into all those things. Start small, do the basics and work on your idea. Put it out there.