The bottom of your drilled hole will at best be a plane surface..at 0.2 mm scale it will probably have a scrape mark across the bottom from where the drill stopped..
This ridge is worse to start on than a plane surface…
Once deflected the drill is off on its own…
I would start on a faced and if needed stoned face…
At 0.2 mm in brass say 250 000 rpm…so inpractice as fast as you have…
Also you need a drill chuck of better or comparable runnout for your drill..
But try dead flat face and fast as possible…