Adding Products To Amazon

Is it just me or do you have to be part of Menza to add new products to Amazon? I do not do it very often but it wont let me past the ‘ASIN’ field? Totally does my head in, have always been reluctant to add more products as it is so complicated. Have watched the videos that still don’t make any sense. Why we cannot just copy and amend like you can in EBAY is beyond me!!!

DRIVES ME NUTS!!

I appreciate it must be easy as there would be no-one selling on Amazon otherwise :)