I tried doing it on Ipad + Apple Pencil. I used apps like PDF Viewer, Good Notes, Pages etc.
After suffering agony because of technical glitches, slow pace of writing, eyes dryness as ~ 9-10 hours screen time, I realised the beauty of Fresh White A4 Sheets coupled with TriMax.
After shifting back to Pen-Paper Mode, I realised my presentation, speed, alignment improved which is sine qua non for Mains.