Pretty good read, but tells me I need to be looking elsewhere.
Its mentioned pool-mining but I was reading about scams with these as well.
It seems there is a lot of risk involved unless you go with an easy one-stop -shop solution like NiceHash.
The site you've found is pretty good, it explains it fair enough. But I respect your choice, let's try something else.
Something else that came into my mind this morning is multipool. Something like https://miningpoolhub.com/ There you can get the coin you are mining or Bitcoin, you can mine one coin or more. They even claim to have multi-algo mining, which may be best to see how your stats go (I've never used that, even in the days I've been mining a little)
Maybe it's a direction to look closer to your needs.
I expect that after experimenting a little you'll settle for one coin and one pool. Until then you should not mind if you don't start it perfect.