I’d start by deciding what your goals are, so you know what to work towards in terms of hardware, software, and processes. Once you’ve got some sort of an idea, explore ways to accomplish it and post your questions in this community. It can be super overwhelming to get started, but the research and problem-solving is half the fun.
I mostly listen to death-doom rather than strict death metal, but there’s a fair bit of that out there. My two faves in the genre:
Draconian has clean female vocals alongside growled male.
Swallow the Sun has a wide range of vocal styles, but getting increasingly cleaner pretty much every album (along with clean female vocals on a lot of tracks).
Again, this is death-doom so a lot of the stuff will be a little slower-tempo than straight death.