I am very noob ot OpenStreetMap. I’m using a website called umap.openstreetmap.fr and I have all my markers there uploaded via a CSV file. I would like to import this (or the CSV file) into OpenStreetMap and add a layer (?) to show the last 2020 election results per county whether red or blue with my markers on the map. How would I go about doing that?
I’m not sure what you want to do beyond what uMap already does?
This kind of temporary data (election results) is not suitable for importing into the main OpenStreetMap database. But displaying this kind of layer over a base map from OpenStreetMap is exactly the kind of thing that uMap does. So I’m not clear why, having started with uMap, you want to move to something else.