[Kobo] questions re series and converting

Hi all,

I looked around, but I couldn't find info that was at all recent and addressed what I needed.

I have a Kobo Aura One, recently switched from a Kindle, so I'm working on getting my library converted from Kindle format to Epub so I can read them on my new Kobo.

1. I have some DRM'ed books that I bought from the Kobo store, which I'd like to keep and be able to convert in Calibre, but I haven't figured out how to do that. I need to be able to do both Kobo books and Kindle books, since I still buy from both stores.

2. Is there a way to have the series info show up on that line below the book title on the Kobo like it does when you buy a book directly from the Kobo store? I could only find one instruction that talked about how to do that, but it was several years old and sounded like it might mess up the Kobo device. I definitely don't want something that involves adding code which may screw up the function of my Kobo reader.

I'd really appreciate help on this. I'm pretty new to using Calibre, so I kinda need instructions given in detail because I don't know the shortcuts or special terms used.