Place your files into designated folders (Movies, TV Shows, Music).
The Ultimate Guide to Installing Entertainment and Media Content on Any Device
If your router is far from your devices, consider a mesh Wi-Fi system (like eero or Google Nest WiFi Go to product viewer dialog for this item. ) to eliminate dead zones.
The moral of the story is that it's okay to ask for help when you're feeling overwhelmed. Sometimes, all it takes is a little bit of guidance from someone who knows what they're doing to get things back on track. Follow-up: