Deeplabcut is one heck of a program. The GUI is pretty easy to use once you have the hang of it, and it seems very powerful. The how-to guides aren't great unfortunately, but the introductory video on using the GUI is a good step by step intro.
For me I download and install it all and then open CMD with admin rights and type:
python -m deeplabcut
Then it's the GUI. Some things they don't mention which are important are:
1. If it looks like nothing is happening after you click a button sometimes you have to go back to the terminal window and press the "Enter" key.
2. It's best to change the directory to C:\Deeplabcut or something like that in the CMD window and run everything there. Otherwise it can get a bit confusing where things are.
3. Make sure to install the correct (i.e. old) version of wxpython
pip install -U wxPython==4.0.7.post2
Absolutely brilliant work though otherwise.