If you'll be spending time on video calls, design a good lighting and sound system. Some easy, inexpensive additions can greatly improve your professional look.
For the main light, use a 10" ring light made for cell phones but place it at eye level off to the side at about 2 or 10 o'clock if the camera is at 12. Then have a small LED panel on the opposite side, dialed down to 50%. For an extra touch, place another LED panel at 5 o'clock (if ring is at 2) but about 2 feet higher aimed at the back of your head and dialed up to 200% (bigger panel). If you have a good background, a fourth light on that might be nice but can also be distracting; avoid a busy background that will distract viewers.
For sound, use any standalone mic. One sitting on your desk will sound way better than whatever is built in to the computer or camera. Agree with others about adding insulation inside walls and ceiling while you have the chance. Also consider that bare walls in an empty room tend to be echoey so adding furniture and stuff can help.
