Where’s the best place to get my certificate?

I am a senior in high school who is starting college at Msu this fall,I have been in all sorts of accounting and business organizations during my four years of high school. Recently my teacher has told me that I really need to get an Excel certificate so I’m curious on where would be the best place to achieve this. When I looked them up online, I do see Corsa along with other community colleges, but I just wanted to get some other opinions on this.

Any help is appreciate!!