Hi, I want to be able to show updates on my website w/o the repetitive uploading of my index. Can Blogger make this possible? If so how and is there a tutorial?

you don't have to refresh the whole thing. Just do the other one.

... a bit vague. What?

like after you save your settings, you will see two options at the top.

one that says, You must republish your blog to see the changes.

and the other says, (You can also republish index only.)

choose the first one.