easymode

@Archmage

It depends on what genres of stories you like the most. Here's some pretty popular manga that are good to start with:

• Berserk
• Monster
• Hajime no Ippo
• Vagabond
• Yotsuba&!
• Azumanga Daioh
• Dungeon Meshi

I read almost everything digitally on my ebook reader as well, but I do own the physical Berserk omnibus since the art is so detailed it's nice to have the big pages. Dark Horse Comics releases very good physical manga; if you want physical stuff and don't want anything secondhand, look there.
Whenever you add manga to your ebook reader, I recommend first using Kindle Comic Converter to downscale the pages to your device's resolution to save space and reduce loading times.

Can't really pick a favorite of them but my top 3 are Berserk, Oyasumi Punpun, and Vagabond.
So far recently I've been enjoying Chainsaw Man and I just started reading orange and Claymore.