You can definitely use both. But I think, the difference will be the intentionality. “I am attending” usually gives it more of a definitive attitude, you are very likely or for sure going to do that. “I will” gives the idea that is something you are doing in the future but there is still a possibility that it might change.

I need some experts help to correct my text!

In addition to her studies, she also gained dynamic experiences while traveling the world. She is deeply interested and can relate with Asian culture. This passion helped her develop her interest toward modern and contemporary Asian art. Particularly, in asian modernity. This is shown well in her graduate thesis ‘Modernity in modern art of South Asia and Nationalism: Varma and Tagore.’ In this regard, I support her decision to study in VISVA BHARATI, which is known for its abundant research on Asian modernity, in India. I am certain that your scholarship program this year will be a good opportunity for her growth as a future art historian. Please contact me if you require any further information.

i will look forward someones help! thank you!