how can i easily master photoshop?
It will take you a lot of time to master Photoshop, you need to follow courses on YouTube from one of the trusted channels or from one of the popular blogs, starting with learning the basics first and then starting by applying what you learned from the courses on your photoshop, You need an hour to two hours a day to learn a new lesson from the Photoshop course.
Yes we usually need to take courses to find out Photoshop it's impossible to master the fundamentals without a course Courses are often taken both offline and online. we frequently don't understand by watching videos on YouTube during which case the courses provide many benefits.
Photoshop creator took which course to create it from nothing?
Basically you can learn everything from practice but you need to have technical skills about it for that most people take lesson and few others learn on their own by researching everywhere.