I am 25 years old and have done my graduation. Am I eligible to join VFX course?

Yes, you are eligible as there is no age limit to start a career in VFX. There are a lot of VFX training institutes available to start a better career in VFX industry. The main thing is that you have interest and a creative mind.

Yes, you can but please think twice before you joining because it's a competitive course, you must have unique and good knowledge in explaining the things going in the world.