Due to the current situation, I can't go outside to fly my drone. What's a small and easy to control nano drone I can fly indoors (no camera necessary)? It should be easy to control as I don't want to crash into anything but don't want to give up drone flying altogether.
This depends - do you want to fly FPV or LOS, angle or acro?
For the LOS angle, I absolutely love the Hubsan X4 H107C. It’s relatively cheap, flies smoothly and is really robust. There is also a version without a camera called the H107L.
If you want to fly FPV acro (or angle), the Tinyhawk, Mobula 6 and Meteor 65 (though you may need a throttle cap) are all said to be very good.