ecommerce in spain as a student visa holder

hello everyone,

i have arrived in spain last week, i have already started thinking of how to lift the weight of my parents paying off my monthly expenses. I am looking to start selling stuff on etsy and was wondering if i can do that while having a student visa. I can obviously wait until i get my residency and work permit. But the permit in question only allows certain hours of part time work, and i don't want to risk getting my visa revoked or getting in legal trouble.

My questions are:

•	Can I legally open and run an Etsy shop with only a student residence card?

•	Would I need to modify my residency to include self-employment authorization?

•	If I only sell occasionally, does that still require registering as autónomo?

•	Has anyone here done this successfully while on a student visa?

Any advice or personal experiences would be really appreciated. Thank you!