You do not need a studio
A recent phone camera, a window and a sheet of white paper or poster board are enough for clean listing photos.
Set up the light
Place a table next to a window and shoot in soft daylight. Avoid direct sun, which makes harsh shadows, and avoid mixing room lamps with daylight, which gives odd colours. A white board opposite the window bounces light back and softens shadows.
Set up the background
Curve a white sheet or poster board from the table up the wall so there is no visible edge behind the product. A plain background also makes later background removal much cleaner.
Shoot
Keep the phone level, use a stack of books or a cheap tripod, wipe off fingerprints, and fill most of the frame with the product. Take several angles: front, back, side, a close-up of details and one for scale.
Edit and prepare
Crop with the free cropper, remove or whiten the background with the product photo background tool, then check the size you need: 1000×1000, 2000×2000 or another size from the marketplace rules.
Keep pages fast
Large photos slow a store down. After editing, use the 200KB or 500KB compressor so pages load quickly with little visible loss.