Would like to know about beginner certification course
Do you mean for personal training, or for group exercise, or for something else?
Here is a link for a tool that lets you compare personal training certifications, if that is what you are looking for. If you can identify the best certification for your needs you can then find the training that meets the needs for that credential.
http://www.acefitness.org/fitness-certifications/personal-trainer-certif…
good luck