I agree with RJ - start with mild steel keystock from the hardware store and grind on that until you can grind a decent tool with control. It is far, far, far easier to learn this skill that way.
This deal is still active on ebay:
https://www.ebay.com/itm/50pcs-3-8-...=item486dc82c77:g:ITMAAOSwRLZUCgJb:rk:21:pf:0
50 bits of 3/8" M2 HSS for $64.00! You would be hard pressed to find a better deal no matter where you shop. This is Chinese HSS but it works pretty okay. It is not of the quality you will find from good suppliers from the US or Europe but it is more than adequate for a hobby shop.
I have or had a whole bunch of bits ground by machinists of the past and it is fascinating to imagine what job they ground the tool for. Some of them are pretty imaginative; most were crude, and some would barely cut Delrin. Nowadays, I will personally not buy pre-ground tools; once you fix the previous grind the tool is usually too short to safely work with on the grinder.