I've dabbled with react.js and node.js, but looking for wider perspectives for full-stack programming.
1. Recommended languages to learn (and why) 2. Teaching resources (online courses, youtube channels, etc.)
Much love.
MDN (Mozilla Dev Network) is best for detailed documentation, and has plenty of small lessons but no actual bootcamp/course. Avoid w3schools except for reference documentation; they have gotten better, but there's still plenty of simplified examples that are bad practice like inline styles and event handlers.
One of the first lessons from good teachers is to not compare yourself to others, as everyone learns differently. Only compare yourself to your past self. Programming is extremely complex and usually doesn't "just work" for the brain, so any progress towards understanding is great.
You have any recommendations for front and backend languages?
Mainly focusing on website and web app development.
I will say that you should look at your local community college and see if they have programming classes. They are usually cheap, taught by retired working professionals and more hands on with smaller class sizes. If you want programming to click easier, this would be my actual recommendation.