I Need Some Suggestions about the Next Steps of learning (Programming & Designing) and Practicing

I became to know about Basic Webdeveloping tools in 2014. But I started learning web programming languages in May 2017 . So far , I have learned html5 , CSS3 , JavaScript , Jquery , Ajax and BootStrap 4. Now I have to jump in Server Side Programming Languages and my Target is PHP. But majority of people , when googled , saying that PHP is not a good choice now-a-days.

Note: I want to create a web Application(website) for RealEstate classifieds. There are many classified websites already, but I have some different Ideas.There will be a lot of use of dataBase to store data of properties. And also I want to associate myself to this business in future.

Although this question have many answers on the web, but I think here I can get more unique answers. So please suggest me what should i learn next .

And Second, I want to Use Some features of Adobe PhotoShop to sell my skills on internet( e.g. on fiverr) . E.g.. I will Offer " I will Change background of your Photo" . This is the most simple and common example. What are the other ways that I can use to earn some money to fulfill my needs until I am a full Programmer

And third , I am feeling that I am not recovering material that I am learning properly in my mind. When I look back for some codes that I have learned , some time , I feel Its is not studied by me. So what are the best ways to do Good Practice.
Now soon I am going to create my first Website. and I want to make turorials for what I have learned . The purpose of creating tutorials is only that i want to Improve my own Knowledge As "Teaching is such a way that increase your knowledge".