Great find on the simulator. I'm sure lots of us will have fun with that. Here's the thing, you aren't going to be able to get down to 1.5C because we are already past 1.5C and getting close to 2C.

Warming is accelerating. The rate of warming has doubled since 2015. The planetary albedo has dimmed and we are heating up fast. We have to crash decarbonize "right now" or it's going to be too late.

Living in Bomb Time - 20 : Heat doesn't "just happen", why warming has accelerated.

The most probable outcome at this point is temperatures between 4-5C higher and a population of between 1-2 billion living in the wreckage.