how to convert dvd's and blu rays to digital store them and play them back on your TV?

You will probably want to look into the high end media players such as Zidoo, Zappitti and Dune. 

Zappitti actually just recently came out with a mass storage NAS device that will rip DVDs blurays and CDs into it's storage array for playback:

https://www.zappiti.com/zappiti-nas-4k-hdr

It's likely expensive, but combined with a Zappitti media player, it's what you're looking for.

Just use a ripper program. There are gobs of ’em.
Put them on a drive and plug them into a player.
Roku Ultra $80. Old ones work fine too. Or a Samsung, LG or TCL TV.
Are you late to the party or what?
Been doing this for 20 years. Just to avoid previews and other BS when all I wanna do is watch a movie.
Now.
I travel with an old Roku and mucho movies on a SSD. 

How do I get my movies on the  Zappitti media player?

Your movies ( music ) are stored on the Zappitti NAS.
The NAS is connected to your network ( Ethernet )
The Zappitti media player in connecte to your network ( Ethernet )
The media player detects the NAS and all the movies ( music) in it.
Probably , Apple TV 4K would detect the NAS too.

Zappitti media player ( I think )
https://www.amazon.com/Zappiti-One-SE-4K-HDR/dp/B07DLWVYQX