Answer 1

If you are a beginner, I would recommend first learning the basics in one language before starting to learn another.

However, you will have to try it out yourself and see what works best for you.

Answer 2

I agree with Lisa;
if you have free time in the morning and evening:
- in the morning: python
- in the evening: c#
or vice versa.

if it seems too hard in this way, choose the easier language, but try to learn something every day :-)