Router settings GL-iNet GL-MT6000 (Flip 2)

I'm looking for someone who understands how to configure a GL-iNet GL-MT6000 (Flip 2) router to connect to and work through a foreign VPN. I need to understand what settings to use, which provider/hosting provider to use, and which package to choose to connect the VPN to the router. I also need to understand how to resolve potential leaks, stress testing, and so on. After connecting the router and installing the VPN, I need to make sure there are no issues that could reveal my current location, and that everything works reliably.