Cutting a hole in sheet metal

You're far better off doing it in the dress press because you won't be wobbling it around like you will with the hand drill.
Since you mentioned your drill press is to fast I can help you out with that. Below is the link to the very 15 amp Electronic Fan Speed Controller I use on my drill press when the slowest pulley just won't do it. If you buy one of these units you'll be able to do a lot of things on the drill press you never thought possible.

https://www.amazon.com/dp/B07T9BLJ7L/?tag=fabo03-20

Vsriable-Controller.jpg

Tom