Upgrading for 4k raw footage

2 years ago I bought a budget editing PC with the idea that I'd upgrade as needed. Recently, I've been working with 4k r3d and braw footage and having frequent lagging and crashes. I'd rather not edit offline if I can reasonably avoid it, so I'm looking for the smartest upgrades to make.

Current Specs:
CPU: AMD Ryzen 5 1500X 3.5GHz [3.7GHz Turbo] Quad-Core 16MB L3 Cache

HDD: 240GB WD Green SATA-III 6.0Gb/s SSD - 540MB/s Read and 465MB/s for OS and programs

Mirrored Seagate 2TB BarraCuda SATA 6Gb/s for media

MEMORY: 16GB (8GBx2) DDR4/2400MHz Dual Channel Memory

MOTHERBOARD: ASRock AB350 Pro4 AM4 ATX w/ RGB, Realtek LAN, 2 PCIe
x16, 4 PCIe x1, 6 SATA3, 2 M.2 SATA/PCIe

Doubling my RAM seems like the most logical step, but after researching I have 3 questions.
1) Is my CPU up to the task? One whit paper I read suggested at least 12 cores for editing 4k r3d footage.
2) Will 32GB memory be enough? I currently have 2 8gb sticks so adding 2 more would be easy. But do I really need 4 16gb sticks?
3) Would there be much difference if I upgraded to 3200MHz RAM?

Thanks for any advice!