Go to Settings/Preferences and select Virtual Background.
If you’re using zoom, you can try out the fake background effect. You can also dress up the background with a plant or an interesting antique. Clutter makes your background less appealing. Try to keep the space behind you clean and neat. Some options are in high demand, as you can imagine. Here’s another inexpensive option: Bescor LED Light Kit (B&H). Check it out here: Lume Cube Air VC (B&H) or directly from Lume Cube here. They make small lights for video and photography. There’s also a new light that you can fix to your laptop with a suction cup. Ring Light Tripod Kit or Ring Light w/ Stand (Amazon). And here’s a popular option on Amazon that is USB powered so you can plug it into your laptop. This is an example that can also be used with your mobile phone: Yongnuo LED Ring Light (B&H).