So much advice..........and I recommend speaking with a CPA to get the most updated advice because profit has to occur at some point to remain a business. Lots of tax rules and awakenings if you've never owned a buisness.
If that base is already covered, just keep track of every penny coming in and going out. New business owners often cannot pay themselves for quite awhile so make sure you are prepared.
You said your business was going to be a specialty business, so staying on top of trends and being prepared to shift quickly is crucial.
It's very exciting you had a great experience with your pop up! Smart move on your part to move slowly and hope you'll keep us posted!! I've been back and forth being an employee, then business owner, then employee, then business owner again until I retired. And I think there will be another one in my lifetime, yet! Excited for you!