No you can't link accounts.
This account is private, but it should be a business ine as you are making items to sell.
Upgrade now before ebay close both your accounts.
More steps to address false private sellers
At eBay, we are dedicated to ensuring a fair and equitable marketplace for all business sellers. To achieve this, we monitor trading activities, and we’ll continuously help business sellers using a private account to transition to a business account, or restrict selling activity as necessary. In addition, we’ve reduced the number of free listings available to private sellers.
