Hmmm. You have a few things mixed up, which if you are new, is understandable.

First: did you apply to Handmade? And get accepted? Doing so should have initiated a set of multiple emails about Handmade, its guidelines, and how to list.

Because Handmade is gated, no one can list in Handmade unless they have applied to be in Handmade, and been accepted.

You didn’t need to upgrade / pay for a Professional Seller account, unless you already had one and you were already selling a certain number of non-Handmade ie, Marketplace items per month.

Otherwise, once you are accepted in Handmade, you automatically get upgraded to a Pro seller account, for which the monthly fee is waived through 2018. But don’t worry about that for now – you can get a refund on the Pro account monthly fee if you qualify, once accepted in Handmade.

And you needn’t have deleted your Marketplace listings; plenty of Handmade artisans sell in Handmade and also sell non-Handmade goods in the Marketplace.