Chosen Solution

So I bought a Nintendo switch v1 second hand and it’s stuck in RCM mode. I guess I want to know how to factory reset since I don’t know what firmware they already have loaded on. Unless there’s a way I can figure out what firmware they have loaded on I can do that as well. But I guess I want to start it on a clean slate so that way I can do it myself. But I have no idea how to factory reset it to start it clean. Greatly appreciate any suggestions.