Yes you can still practice.
There are also remedies for diabetes that may help you. My advice is to pick one and work with it, while also making sacrifices to help others who are suffering. In this way you can earn the healing you need.
Most of the remedies are in this book (but not online):
“Nothing is easier than self-deceit. For what each man wishes, that he also believes.” —Demosthenes
"Do not worry; cultivate the habit of being happy." —Samael Aun Weor