220p replaces 101p although 101p was 6 weeks and 220p only 3 (edit: actually is more but I think you have double time to each lesson). Both courses have m001 as requirement but the course covers much of all the other courses, you’ll see aggregations, searches, performance, etc so I think 220P better describes how much knowledge or experience do you need. It’s better if you have heard about those subjects before.
In the courses you’ll review Mongodb subjects as the mentioned before and the use of a language’s driver, in m101p or m220p pymongo. But the amount of code you have to write for every exercise if at most 5 lines I think. So, imho, you have to be confortable with the language choose in order to focus in mongo and not in the environment deployment or understanding the code.
Choose whatever language you feel most confortable with. I’m not a python developer and my found 101p perfectly doable.