The live help really is an awesome, little known "feature" of XLights. It's great and if you can I'd suggest you try to connect to it. I also strongly recommend Falcon controllers. The general approach you want to follow is:
1. Connect the strands to your controller.
2. Get your controller to recognize them. I'm not familiar with the Pixie, but most controllers have a test mode, sounds like that's working for you at least to 100.
3. Once they work in the controller, then you need to add the controller to your XLights setup. I don't like to use the "Auto Layout Models" feature so I usually turn that off. Much more helpful in my opinion is the "Visualise" button. It should show you each port on your controller and what is connected to each port. Also helpful is the Tools/Test feature. For testing your controllers it's very helpful.
If you're willing to talk with a stranger I'd be happy to chat with you. I enjoy the hobby and getting new people into it is a pleasure to me, so if that's of interest send me a DM with your phone number and I'll text you to setup a call.