What device are you currently playing on
If you're playing on a mobile device it's as easy as sending the save to yourself and you can pick up and play with everything you've collected thus far
Consoles unfortunately can't though that's mostly by virtue of them being more restricted, and there probably won't be a syncing account system for the game
I totally understand the frustration of losing progress when switching platforms. Having a unified account system would solve so many problems, not just for Stardew Valley but for other games too. In the meantime, if you're stuck working around the limitations, it's a lot like tackling assignments with limited resources—you can always seek tools to help. For example, when juggling schoolwork, services like
nursing paper topics provide practical solutions for staying on top of things. Hopefully, developers will consider adding cross-platform syncing soon—it’s such a quality-of-life upgrade that many players would appreciate!