
You might want to take a look at this thread viewtopic.php?f=21&t=56878
It goes back quite a way, so maybe start with the first post at the top (which has links to installation guides for Ubuntu and various distros based on Ubuntu) and then go to the most recent posts at the end to see if there's anything useful in there for you.
I also have Pop!OS on one of my computers but haven't attempted to install Resolve because I'm running it on an old Lenovo laptop with integrated Intel graphics, which isn't going to work for Resolve (see the configuration guide for Resolve for details on the machine specs you need; most laptops won't work very well, and you really should be running a powerful desktop machine with a real GPU, like the Leopard WS from System 76 which offers configurations with up to 4 GPUs). Kdenlive works fine, though, and I bet Lightworks would work as well.