Chromebooks come with keyboards, trackpads.
I use Chromebooks, tablets, phones, all the time.
What you are describing is a neck head tilt alignment problem related to head tilt where a laptop style format the tilting of the head down to be near where the screen is near your hands makes for (eventually) a painful result. That means you should have bought different technology altogether. Chromebooks are deliberately cheap, deliberately for students. For a productivity worker, they probably need a docking station, with a heads-up LCD and other devices.
Aside: BT keyboards are useful, but in other non-Chromebook contexts. Like tablets, or Raspberry Pi. or older folks who know how to finger type blind but the screen is feet away.