I have some ideas - change the server software in Amp for that instance. Move the nether and end DIM folders back to how they are in Vanilla (although not sure how to do that with the amp file manager). Anything else? I’m not trying to bring over any mods or get mods working at this point. Just want to change a server instance from paper to fabric.
Or should I create a whole new instance using Fabric, start the server, and then replace and bring over some Minecraft files from the Paper instance including the world folders and some key config files using other online guides?
If I go the first route and goof it up, can I restore using an Amp backup? If so, seems I should try that first.