Info for kindle unlimited is here.

Customers in the UK, Germany, France, Italy, Spain, Brazil, Mexico and Canada can sign-up for Kindle Unlimited in their local Amazon marketplace

I also liked Dragon's Wrath. It's a fairly cookie cutter VRMMO but still pulls itself off pretty well. I also just started reading Dragon Vein which seems to be about a WWII paratrooper getting transported to a fantasy world.

As far as the issue you might have had with Fimbulwinter's MC's use of power, while he does have close to infinite power he cannot apply that much power safely. It would be akin to having a nuclear reactor acting as a PSU to your home computer.

Some of the LitRPG stuff on Amazon qualifies for this. There are quite a few cool original English stories as well as some great translated (mainly from Russian) stuff on amazon available pretty cheaply or for 'free' if you've got the monthly kindle unlimited subscription.

The Daniel Black series and the Dragon's Wrath series most closely match the kingdom/etc building themes you're asking for.