My dad drained the transmission fluid. Help!

Title says it all. Was going to take my 2016 Subaru legacy to the dealership as I always do. When my dad found out they were going to charge me $120 for an oil change he said this was a scam and he can do it himself, I just buy the materials.

Anyways. He does the “oil” change. I try to drive off but the car starts to shake and stall almost immediately. My dad takes it for a drive around the block (total amount driven 4-ish miles), same deal, only this time the engine, brake, and oil at temp light all turn on. We investigate. Turns out he unscrewed the wrong drain plug. So now my car has no transmission fluid and extra motor oil. How fucked am I?