I would recommend a synthetic 15k hone like the Naniwa SS over a natural as a starter, purely because it is a tried & true performer, known uniform grit & binder & as it is well documented & videoed online to learn to use it
well worth the coin spent & would last a lifetime of only touching up a couple of razors
alternatively you could also try making yourself a Balsa paddle strop
all you need is a piece of 75 x 16-20mm thick Balsa from bunnings
sand 1 side flat on glass ( or a diamond plate ) with 2000 grit paper
then add some Chromium Oxide powder or a pre made crayon etc
and good to go
Look for these Kremer pigments ( they are top quality & uniform sized ) in art supply stores, I got mine from out of Melbourne
Kremer Part numbers
Chrome Oxide #44200 is 0.3 micro
Iron Oxide # 48100 is 0.1 micron
These will cover you for a lifetime
be wary of some Chippies green polish & Chrox pastes used for Chisel's etc, as they can be mixed sizes & harsh on razors