How to read file from Download folder

I can now export a csv table to a tiny db, but when I want make changes to csv file I need to build a new apk, my goal is to put csv file in download folder (or Documents) and read it from there.
I tried without success
/Download/file.csv
/storage/emulated/0/Download/file.csv

See e.g. here:

I tested my code with an old phone, it runs ok, but my android is 10, I have to wait ?