Help for a newbie please

Hello and Happy Easter Weekend everyone.

I’m sorry to ask some silly questions but I have moved from using Safari to Chrome with GS and it is much harder to list than before.

My main trouble is in uploading and editing images in the template. Would anyone be able to tell me if I am able to make my listings live, can I upload additional images in eBay directly or do I have to do them via the GS template?

Apologies if I have overlooked the answer to this question in another part of the forum.

Thank you.