How do I code with industry’s standards

I'm a cs undergrad. I wanted to ask how I learn to write code in a standard way. Till now I've been into CP(competitive programming) only, recently when I was building my sort of first fullstack project, initially I tried to do it all by my self with just documentation, then I asked ai to review whatever I had done and it pointed out so many area where I could have done better, like project architecture, folder structure or way of writing code and I realised that I need to know all these basic rules and way of doing things, unlike CP where you just need to practice to improve.

Should I first watch bunch of tutorials on building software?