Umbrel and ZimaOS are way easier to run for newbies
You don't even need intel Xeon or EPYC CPu, any new age CPU will work fine, there are so many tutorials online, they don't take too much CPU power and 16gig ram will be fine.
1TB is enough if you are going for Digibyte and Bitcoin Cash.
If you want Bitcoin too you should have 2TB installed.
Have you tried creating a mining pool with low-end hardware? Umbrel and ZimaOS are good solutions for running your own Bitcoin and Lightning nodes, but a pool requires more modern hardware unless you want to mine solo.
The more hashrate you plan to connect, the more powerful hardware you'll need.