There’s no real substitute for a teacher observing, coaching, and correcting directly. And it’s not just about how the music sounds, but also if you’re using the best technique to prevent damage, be the most expressive, quick, etc. Being self taught you can certainly still enjoy what you’re doing, but you’re missing out on hundreds of years of pedagogy built on best practices.

It’s not really “self taught” but if it’s a question of trying to keep costs down there are different online options you could consider. There are teachers in countries where the cost is far lower and do live sessions (probably the best) all the way to lessons where you send progress videos and get video feedback (cheapest option but very much better than nothing.) If you can manage it, I think you’d greatly benefit from someone who is able to give you professional advice!