I think that most groups that have ways to circumvent DRM for direct rips keep it close to the best, which is why you don't see direct rips aside from more popular titles much anymore, and by very few groups.

If you are talking about effectively adding to the WEBDL scene as in taking streams directly from sites and decrypting them you are going to want to start to find your way into the scene more. I have no idea how to but I'd start with a more exclusive site like a private torrent site and work your way up to good standing through other upload grunt work like filling requests etc. This will in turn open you up to more exclusive forums on that site where you can ask this question again.

As far as I know all roads lead to a rooted a android device as a means to then figure out a way to either get he file without the DRM as part of the playback from the App or direct access to the full file in it's original version and to then enploy the definitely closely guarded secret of how to crack the DRM. This is only stuff I've gathered randomly reading things.

I use MakeMKV for ripping dvds and blurays (although honestly unless I really love the source material and want the highest possible quality I just download it).

They seem to have an active forum, that might be a good starting place.

Might be easier to use a capture card or similar to just record your pc.

Widevine DRM s the rabbit hole it you want to do webrips. If it was me, I’d get an ADTH NextGen TV receiver, hooked to an OrangePi 5 HDMI input. Need more good sports streams, and over the air should be free for everybody anyway.

Been years since I ripped a disc but DVDFab is probably a good place to start. It still it exists, I just found out, and it looks like they have a streaming ripper too. It never failed me when I tried to rip a disc.