Coding is the fun part, but it's less than 5% of actually launching and making a successful product. If you don't think you want to spend most of your time not coding, don't try to make it a business!
Marketing is more important than making something. You will get a small boost from things like this (I was always too embarrassed to post here!), but it's an endless pit of time and money! To do it right, I've heard all sorts of numbers, but a good rule of thumb is every dollar/hour you put to making your game, put a dollar/hour to marketing it as well.
From a technical perspective, your stack is fine. You want to make sure you host all your assets behind cloudflare/s3 or similar, the $5 server is fine for gameplay but if you also try to make it send all the stuff, it's gonna die. (As evidenced today!)
Most of my other experience and advice is about how to run a team and set budgets and goals. If you're going about it as a hobby (and that's probably the best way to go!) then just keep doing what you're doing, write some blogs and foster a community instead.
