Question about Nintendo Mario Kart 8 Deluxe

Yes, you can. However, you need a Nintendo Switch Online membership.
This is subject to a fee. There are 2 types: individual membership and family membership.
This membership can be tested for 7 days (which I would do to test whether the interaction between the Switch and the online connection works properly).
The prices can be found on the Nintendo website.
I hope this information helps.
Have fun