Starting a freelancing practice is more likely to bear fruit, but it's a very different ballgame of overheads than "just" the core job itself, if you want to get the full rewards of being a freelancer.
Hosting is pretty cheap, we have insanely good tools to automate tedious parts of the process and the time investment isn't huge as well.
It takes time to find and execute these ideas. Yes the tech can be cheap, maybe even building it can be cheap, but the time to grow your customer & client base from scratch can be highly varied.
If it were really this easy, you'd have every person on IndieHackers having ditched their jobs already because their ideas have taken off. Yet very few have.
Go out and execute, yes, but it can take many iterations to get anywhere.
Even Pieter Levels has about a 10% hit rate on his projects being successful.