If you're trying to write something on Bitcoin, I'd study how to use OP_return from scratch as an exercise. Could probably use testnet for that, it could be useful skill because not everyone knows how to do it

If whatever you're inscribing is too expensive for OP_Return because of size limits then look into these ordinal inscriptions, I can't imagine what mark you'd want to leave that'd need the discount at a particular blockheight 🤷

jpeg pictures seems like a rehash of rehash of a bad idea a decade ago that has never gotten anywhere, i can see how it can be fresh to someone but it's such a boring idea.

If you're just doing it for the hype, I'm sure bagholders would love for you to promote their rare sats for them and you don't need to waste your time to learn how to buy expensive sats😅