First welcome to the world of development 🙂
If you want to learn I suggest that you read a few tutorials. I like the one on www.w3schools.com. And do a lot of small projects.
When you have basic PHP skill you should learn SQL as well, and how to handle it with PHP. More tutorials. And more small projects. Or maybe parts of the real site.
Then you are ready to design the real site, and start to code.
When you have specific questions don't hesitate to post here and ask for help. But asking for others to learn you how to program won't work in forums. You have to do most of the work, noone will code for you.