Vatican Museum - Guided Tour

Hi everyone, I hope I do not disturb anyone with this post, but I am in a pickle.

We received as a gift some tickets to Rome ! <3 but - they were very short notice sent to us, that means that we could not make yet in advance any reservation regarding any museums and sits to see.

Basically - we really want to see the Sixtin Chappel and the Vatican Galleries, and on their official website I can only find guided tours ticket but in other languages then english (italian/french for example)
To be fair, I just want to see the Vatican Museum and the Chapel as I don't care that much of anything else (personally) - so it is allowed or possible, to just see the museum in my own pace?

Thanks!