Navigating starting expenses?

Im in the very early stages of starting my stain glass business. I have some big ticket items I need to purchase like bulk supplies, work computer, etc. in the past I’ve just put it on my personal, but I guess since these are larger ticket items, I’m wanting to separate them from my personal.

Do I need to register my business first, and then get a business credit card to do so? Do I get a loan?