Lots of info on this on the forum but,
MHO, the Naniwas are best for a standard hone set. You could go glass if you got money to burn. Ive not used them but they get great reviews. In the Naniwas, the 1k pro is one of the best for setting bevel. Then go with the superstones. 3k, 5k, 8k, 12k. That is more than enough for basic honing. Go all out and buy the entire set if ya want. Lower grits and grits inbetween. But they are not needed very often. Pick up a GOK20k if ya want to spend some money as its a great synthetic finisher, but the 12k will be enough until you get lots and lots of honing learned.
Natural stones are great! But IMO not what a begginner should be trying to learn. As with your first question, you will get many different answers to this one as well. And keep in mind that honing takes a long time to learn to do well. You can get lucky now and then, but for consistancy of honing, its years in the learning.
This setup will get you honing and if you collect and restore razors it will still last you a life time. Or u til you buy a different set of hones.