Folks– I would like to construct something like the below on a long wall as a built in that protrudes from the wall (on top of the drywall) where one half of the wall has something like this but the other half would be a bump out for a linear electric fireplace with a tv on top and preferably finished with shiplap. I am looking for some guidance on building the below. I already know how to use pivot hinges and i am assuming I would need to use the same. I am a DIY homeowner. Could I use this forum to see some input?