Hi, and welcome to the forum.
Please note this is a forum about a specific part of growing plant, namely, growing bonsai. And yes, Ikea or the other big box store where you bought this probably told you this is a bonsai. It is however, not. (
www.growingbonsai.net/why-is-my-tree-not-a-bonsai/)
Look for care on ficus ginseng, or any othe ficus for that matter., They love sun, warmth, moisture and need fertilizer. Your plant may have a coat of dust and calcium (You probably spray the plant with water?).