If this is the lathe you have then you are in a really good position to add accessories that you would need for drilling blanks on the lathe:
https://www.rikontools.com/product/70-220vsr
The accessories which Rikon can supply are listed on the same link, but different page.
You would need 78-062 (headstock chuck) and 30-991 (tailstock chuck and arbor).
However, you don't need to buy these Rikon-branded accessories .
Price-wise, you would probably do better to buy equivalent parts from a different maker. . There are quite a few available, for example, the Nova G3 lathe chuck is a very good chuck and often goes on sale at various vendors.
You can buy this lathe chuck which is dedicated for pen blank turning:
https://www.pennstateind.com/store/CSCPENCHK2.html
But I would advise buying a more general purpose chuck together with a set of jaws that do the same job as the ones on the above chuck. . The more general purpose chuck (could be the Nova G3) will be useful for other purposes which you will eventually run into.
And the tailstock chuck you need would be similar to this one (the arbor sticks out the back of the Jacobs chuck):
https://www.pennstateind.com/store/LDC2MT.html
But I would not recommend you to buy this one, because it has only 1/2" drill capacity and I think you might need 5/8" capacity eventually and the price difference is not much ... drill capacity here refers to the drill bit diameter.
Actually, you do not want to buy this particular item. . You do not want the "live" feature which allows the jacobs chuck to turn. . For drilling, you want the chuck to NOT turn, so the arbor will look different (not have the large diameter section just behind the chuck itself). . You can buy the Jacobs chuck and the required fixed arbor separately, but they have to match each other (ie. fit together and you have to be careful to ensure they are the proper match).
It is a good idea to discuss the possibilities with someone here, or go and talk to a person at, say, Grizzly Tools or Woodcraft, or similar (but probably not Harbor Freight). . In Columbus, there should be some good specialized tool stores.
Also note that there are some Pen Turners' groups in Ohio that you could join (nominal, if any, fee) and people there could show you things hands on. . I am thinking of the Mid Atlantic Penturners Group ( MAPG ) and I am sure that Mark James, a member here, could tell you when they have their meetings and where. . There are lots of IAP members in Ohio. . You could search for MAPG on this IAP website.
So ... on we go ... one little step at a time !