Is there sample data that I can use to learn how to use the software?

Absolutely. Sample data can be obtained by following the instructions below.

Step 1Click Here to download Loc8 Sample Data (675 MB) 

Step 2:  Click on Loc8 Sample and unzip/expand the file

Step 3:  File structure will look like this depending on your operating system

Step 4: Open Loc8

Step 5: Click on the three dots next to the red arrow highlighted in the image below and select the 03 Output for the Results Folder: and 02 Sample Data > Single Grid_120 for the Mission Images:

References:  Loc8 Training Academy Video Series:  01 Setting up your Loc8 mission