Hi Rachana, Paris would be absolutely safe for solo travelers! Since you've just 2 days, you can visit Louvre, Eiffel Tower, Notre-Dame cathedral, Champs-Élysées etc. You can check these blogs to know more!
Yes, it is safe. But in my opinion 2 days are little less to explore Paris. It should ideally be around 4 days at least. Here is a comprehensive guide for Paris travel. Hope it helps. https://youtu.be/ZYPCUMyYHAY
It is safe but beware of pickpockets.Its common in Paris even during the day.
Gare de Nord is centre and u can stay there
2 days are quite less but don't forget to go to:
1) Eiffel tower
2) Louvre museum
3) Disney land for sure (yea but two days are way too less)
4) Notredame