I'm trying to fill a hole in a model I found online and I can't for the life of me figure out how to make it manifold. I'm using the F key to create a face around the edges of the hole. I tried to use the Solidify modifier, the merge by distance tool and to just extrude but nothing works. Probably a noobie question but I would be very grateful if you can answer me! Linked is a gif just so you can see the hole I'm trying to fill
