There are a lot of great resources online like Khan Academny, Free Code Camp, and W3 Schools that really hold your hand and step you through using some of the basic tools. These platforms will help you establish a basic familiarity, but it’s the practice using those tools that really counts.

It looks like you’re already doing CS50 on edx, that’s an excellent introduction keep it up! Once you’re finished with the course, then I’d recommend practicing along with guided projects on Youtube, don’t be afraid to make each project your own and try incorporating what you’ve learned across projects. Once you’ve successfully made a few websites and programs following structured platforms and videos, set off on your own and build what you want to build! You’ll quickly find you don’t know how to solve a lot of challenges, do some web searches, and find other people’s code that does what you want to do. Instead of simply copy + pasting their code, rewrite their code by hand (it helps with memory) and think through exactly what it’s doing.