Hi,
Thanks for your posting on this forum. What you want to do is possible. For your first question I have to say that you just need to define your channel in the input of the TDMS Read function.
You can in its input put the name of the channel(S) which you want to display.
For your second question I can say that you need to use the same structure of the first step and plot the other channel and compare them together.
The best hint is to use the example of the TDMS file which you can find in the Example Finder of LabVIEW.
You can also find them by going to any block Diagram and go to the TDMS Read function. Then by selecting Ctrl+h you can open the help file. Then click on Detailed Help to go to its all information. Scroll down to see all examples.
I hope this helps and if you have any question don't hesitate to ask.
Regards,
Hossein