Help for a tutorial to build a map with overlay data which allow user interactions

Hi, I am new to Qt and as part of a self-learning project I would like to build an offline app where I can display the global coastline with layers of environmental data (air temperature, wind). In addition I would like to be able to interact with the map. For example, after drawing a marker or a line on the map, I would like to display a popup panel with plot of the data at these locations.

I don't have any specific requests for this project except using pyside2. I would like to use QML maps and Qt Location if possible, as these plugins seems to be handling geographical data pretty well.

The next steps for me would be to:

1) find how I can draw the global coastline (e.g. https://www.naturalearthdata.com/downloads/10m-physical-vectors/10m-coastline/) using QML maps (is there an easy way to load a Shapefile or .geojson file?)

2) plot extra layer (raster?) on this map (e.g wind, sea surface temperature, etc..).

3) add the possibility to draw marker and lines on the map  in order to get some extra information (similar to this for example https://myocean.marine.copernicus.eu/)

Does anyone know some useful tutorials on the subject?

Thank you!

Loïc