Welcome back! And hello from a fellow hand quilter.
I would start with a cutting mat; rotary cutter and a 6x24" ruler. Some neutral thread. Pins; assorted needles. Good thimble. After that, find a project you want to do and purchase fabric/batting requirements for that project. I don't maintain a stash. I buy for each project. I don't have room to store a stash and my likes/dislikes change often enough that I see no point for myself to maintain a stash. That said, I do over-buy a bit for my projects so usually have some reasonably usable scraps for small projects to entertain myself between larger projects. Otherwise, I give my leftovers to a local quilting friend who does a lot of charity sewing.
Have fun in your new craft area!