Yes. Get a separate bank account. It can actually be a crime to co-mingle LLC funds with your private accounts. Take the amount of money you intended to use to start your business, open the account with that money, and leave it there. Use that money for business expenses. Pay yourself from that account on a schedule (monthly, bi-monthly, etc). As far as which bank you go with, there are so many regional chains and credit unions that I couldn't begin to offer suggestions.
For PayPal, setting up a business account is pretty easy. They're near identical to private accounts, except it shows business information on invoices, and you get some extra little perks and features. Using a business account even as a freelance artist is pretty recommended because it helps prevent doxxing.
For storefronts, Dealer's Den is pretty solid. It doesn't have much of a reach, but it also doesn't nickel and dime you to death the way Etsy does. If you're solid with marketing, it's a pretty good place to be.