Hello all! I have pestered Vaishali quite a lot in the past about the ins and outs of making and selling fine art prints. If any of you find it helpful, I found this online course by an American artist all about the nitty gritty of preparing, creating and packaging fine art prints: https://www.laurieanneart.com/pages/art-to-print#erid4618067 It's not cheap, but it looks quite comprehensive. She also claims that the information is relevant whether or not you're based in the US.
I plan on taking it, and hopefully I'll become a resource rather than a bottomless pit of questions on the topic! Just including the link in case it's of interest to anybody else.
And if any of you are art print savvy and have resources or tips to share, I'm all ears! Thanks.