Should I write my Diary on a physical diary or should I type it on Microsoft Word?

I would use a physical diary. Especially if you are writing in a diary to relieve stress and anxiety before bed, the light from an electronic affects your sleep and makes you tired in a weird way... like you want to sleep but you can't. It's also just better to protect your eyes from electronics in general. Hope this helped!

(I know you've selected the electronic diary, but I'm just giving some thoughts)

@TigerChocolateCone
If one become famous. the physical diary can be auctioned for big money :)