Can anyone recommend a free background website I can use for my posters? Thanks

Are you guys putting in a personalized description for each poster to help with SEO or are you using just a general template for every listing?

Ive come as far as creating a delivery profile on my etsy listing how do I put PS Delivery setting into it? Do i need to do it manually or is there somewhere i can copy and past or something like that? If i do need to do it manually what would i put?

Hi guys. Feel like I'm being really stupid here but I cannot figure out how to add different sizes for different variations of my poster. I'll attach the price section I'm viewing when I'm trying to list my first poster but I actually just cannot figure out for the life of me how to do it lol. PLZ HELP! Also how much more do people roughly charge for US orders (I'm from UK) and 'anywhere else'. Should anywhere else be the most expensive for me or just USA?

Maybe it’s my computer but Upscayl is so slow for me. Could it be my settings?