Sorry to hear your sick, keeping away from people is the best thing when it comes to attracting viral infections, but not good for mental health, and even more if you are a youngster. Take care of yourself.
Your question about making figurines, look around on internet about what is a reasonable price, then calculate the material, electricity, time and your work to see what is needed, but the most important thing is, who would want this to own? Is it hundreds, thousands or more people who want them?
Maybe first make a batch of them all, see what the crowd thinks about it, then maybe pre-order to see the demand. If more people are interested in owning a complete set (because that could up the margin and making it better to sell, because of it (i think)) then the price is better to calculate.
Well, I know there are more people who can advise you, but personally I think a complete set would be more attractive, but, it's your decision.
Take care.