Golden Rules
1. Compatibility - Buy devices that are compatible. Ex: All Alexa Enabled or Google
2. Hub Strategy - Not all devices talk to each other, so look for wifi enabled devices. Eventually for more complex capabilities you will need a hub where SmartSwitch is my recommendation
3. Region Specific - Power is different per country so focus on articles that is within your region.
Excellent Tutorials
From Paul Hibbert (UK Based)