Advice needed

[ZiangzeCho]

I'm a beginner struggling to learn backend web development after getting familiar with frontend. I've chosen PHP for backend development and have been self-learning mostly through YouTube tutorials. However, I'm feeling overwhelmed by the sheer volume of content available, with tutorials covering every single PHP concept in detail. I've already learned about variables, operators, control structures, and functions. My main concern is: How much PHP should I learn to koows echat become a proficient backend web developer? Any advice on what to focus on would be greatly appreciated!