I decided to update the leaf boat from spinach to a baby kale leaf, because:
You shouldn’t feed spinach as apart of your turtle’s regular diet. This is due to spinach having Oxalic acids which block calcium absorption thus leading bone disease and shell deformation. It is possible to feed your turtle spinach once in a blue moon and be fine, but it is best to be avoided due to the health risks. this goes for peas, beans, iceberg lettuce, and cabbage as well.
the best plant things to feed aquatic turtles are aquatic plants (such as Hornwort, water lettuce, and water weed) kale, fresh collared greens, mustard greens, dandelion and romaine lettuce.
Now I will admit I was feeding spinach when I first got him (mostly because everywhere I looked said ‘leafy greens’ but didn’t specify that spinach was the one leafy green you shouldn't do, just that cabbage and iceberg lettuce was bad.) However I immediately changed him to kale and such as quickly as possible (as well as started him on reptile calcium powder supplements on top of the cuttlebone pieces already in his tank). He doesn’t seem effected by the spinach, he is growing and doing normal turtle things. He can climb onto his basking pier, inhales food like normal, swim fine, poops on the reg, and shell isn’t showing any deformity so far. Though I will have to take him to the vet when I can find an actual reptile vet in my area (bum fuck nowhere is kind of low on those lol)
I did make this a while ago, just things got crazier and i wasn’t able to do a lot due too it. But since things have calmed down enough that I could finally update this now. and the reason i am even bothering to update is because, by chance, if other green horn turtle owners see this, then they won’t make the same mistake as I. Also as a reminder to any new pet owner, always double check your research and don’t assume things based on your preconceptions (or knowledge you get from randos that do not currently care for said pet with up to date care or chain pet stores that just don’t care for anything other then sales), I have found they are often wrong.
For the most straight forward pet turtle info (that I have found) is The Turtle Girl  If anyone knows of any other great turtle care info sources then PLEASE let me know and comment it for others to see. The swamp children deserve the best care.