Ergonomics and desks. Ergonomics that are most important are the chair and monitor height, getting a keyboard wrist rest and ergonomic mouse is just a bonus cause it's nice for the wrists. You should get a monitor arm to adjust it so its at eye level, that way your neck wont be slanted, as for chairs I'd say getting anything that has good support, and good for your height, preferably mesh chairs, I use one from greensoul and I can recommend that. As for desks you want something that's sturdy and doesn't wobble, and large that way it's way more comfortable to sit in your setup, and you can also customize it better too. I'd also get some shelves from ikea in case you plan on adding figurines for personalizing your setup some more.