Falun Dafa will not help with your problem. I spent 3 1/2 years studying and practicing Falun Dafa and nothing else for that period of time. It has completely different goals. Go with more health-oriented styles of qigong such as SFQ.
According to TCM, dark circles around the eyes are due to kidney qi deficiency. Kidney qi is very important to cultivate in your qigong practice.
If you're not getting enough sleep, you should also consider going to bed earlier every night.
