Your other choice is to hook up your wired mechanical keyboard to the iPad. But you need to purchase a connector to do so. Apple is selling a USB to Camera Connector kit for RM139 and another newer one which is USB3 and have a additional lightning port to charge your iPad for RM189.
It looked like this:
I suggest getting the RM189 kit because of the ability to charge the iPad and to also provide some power to the keyboard that you plug in. The issue is Apple limits how much power goes out of the iPad into the USB device. If the keyboard requires more power than what Apple provides, you will get a pop up box saying "the connected device requires too much power".
It really made a hell of a difference when you can use a mechanical keyboard with the iPad. And it works across all apps. And you have more space to read and type because the virtual keyboard is hidden when an actual keayboard is presence.