Any Teachers out there? 🍎📚

I have a couple questions, I start student teaching this year and since I’m getting so close to having my own classroom, I have no idea how to start planning. How do first year teachers prepare for their first year? How do they stock their classrooms and make them look and feel great? What do the districts/schools provide for you? What do you pay for out of your own money?? I just have so many questions! I’ve been stocking up on books wherever I can to create my own classroom library but I haven’t done much more than that! Any advice?