IMG 1724PaulK

That looks ragged enough to make it difficult to repair in wood. You’d have to make the hole bigger just to square it off. It already appears like it’s got a bevel on three sides. Filling it in with a fiberglass/epoxy repair would be quicker & easier than wood. Maybe with a waxed piece of plywood on the inside to create a mould & support it until it kicks. A layer or two of ‘glass cloth/epoxy, then some epoxygoop with chopped fibers for strength, then another layer or two of ‘glass cloth/epoxy to tie it in with the outside of the hole. Sand it smooth on the outside and you’re ready to paint.