The following resources are put together by developers such as yourself. The Fish-Networking team has no official involvement in this resources, thus we may not be able to troubleshoot or resolve any issues you experience with them.
Winterbolt Games YouTube educates on a variety of Fish-Networking topics in great detail. If you're looking for step by step teachings, this is the spot.
Fuzzy Man Studios YouTube is a great landing page for visual scripting coders. The author uses visual scripting to cover a variety of tasks commonly needed to network your game.