You're question is currently in the community canvas - where it won't get much attention.
I will swap it to the main forum.
To start to answer your question -
Which version of Tableau?
I assume you have Tableau Desktop?
And what is the data source? I woudl advise if you're very new, just use something super easy to start - you can always get more complicated once your more confident
This is a little old, but may help
Hi Natasha, are you able to convert those fields incorrectly identified as measures so that they're dimensions? Try right-clicking and seeing if there's a "Convert to dimension" option. Or you can click-and-drag them to the dimensions side of the data panel.