The switch has a touch screen so it shouldn't be harder than on a phone. - form factor aside -
When you take the JoyCons off, the form factor of the screen unit is essentially a slightly bulky phablet.
You can't really grip the Switch like a phone, because the rails that the Joycons slide into are uncomfortable. And it's a bit too small for typing on a desk as I might with an iPad.
I also believe that you can use a bluetooth keyboard with it, though I haven't tried.