A good course about GIS Mapping and Data Visualization

hey all! as I said on the title, I am looking for a good GIS Mapping and Data Visualization for frontends or someting introductive to this topic with a lot of code. I do have a base, but I would like to have a more "academic" and organized knowledge. Ah, I do have a background in Python too so, if there is any, you can recommend me courses with that tech :)