Don't feel like rambling too much here but after taking a class (Ecosystem Restoration Design) last year that touched on this method a few notes:

- Yes, you generally try to use native species only. Search for things like the WWF ecoregions map to get a broad idea, search for a local resource on native species.

- The reason it grows a bit faster isn't magic - it involves a higher input effort/cost, and you skip a stage of succession by focusing more on planting 'keystone species' rather than going through an initial stage of 'pioneer species'. - Because of this, they tend to be more attractive in urban environments. See also related organizations like "tiny forests" https://www.ivn.nl/tiny-forest/tiny-forest-worldwide (netherlands), https://theotherdada.com (beirut), more listed on https://www.afforestt.com/about. You do need a minimum width/length to implement, and may need to dig the soil/amend the soil to deal with urban-area compaction.

- The most actionable things you can do is:

   - got money? Right now (temperate winter here) is a good time to plant native saplings if they're not sold out. You may even find some folks 'salvaging' native plants from areas where land is about to be cleared for construction.

   - setup a tree nursery. Native saplings can be expensive

   - try things in a small way, tell your neighbors, start mutual learning.

- Keep in mind not all areas in the world should be planted with trees. Some areas are natively grasslands and thus trees are less populated.

- If you're going to have a dense forest, you need a plan for maintenance so you don't end up with woody mass building up to cause a fire later on (see millan millan's papers "greening and browning in a climate change hotspot". You might be able to partner with a local businesses, school, government, etc. to find a spot & help with expenses/maintenance