Multiple metrics in a single map

In Looker Studio, I'd like to combine multiple different types of observations in a single map. So, for example, I could have:

- A red dot in a given Latitude/Longitude, and the size of the red dot scales with the population there.

- A blue dot in a given Latitude/Longitude, and the size of the blue dot scales with the square footage of parks in this town.

How can I do this? Thanks so much!