Kotario Haha, sounds like the system novel I made about a tree and cell system for a wpc back in the day that had to be about reincarnating as a tree. I’ve put that story on hold; however, and I wouldn't self rec it anyway. But if you like that premise, I suggest reading the winner of that wpc, probably the only other contest story besides mine that didn’t get dropped. It’s called reincarnated as a stick, iirc. I’ve never read it, but seeing as it won and has a good fanbase, then it might be up your alley?