Hello everyone. Hope you’re all doing well.

I need some help and advises regarding my new Bonsai Tree.
2 days ago I bought a Bonsai Ficus Tree and I love it so much.
Yesterday I noticed that some of the leaves have brown spots (will attach photo). Also, yesterday before I went to bed I noticed 2 leaves fell off (they didn’t have brown spots and looked healthy) and now when I woke up I saw another leaf fell off during the night. (Will attach photo).

I placed it on a table in my living room that has window close to it (about 1 meter spacing between the tree and the window) so that it can receive light. The woman that sold me the tree told me to water it at night the day when I got it (on Saturday) and after that once in 3-4 days.

I love it so much and I’m pretty much scared if those are signs that the tree isn’t okay.

Looking forward to hear your opinions and what should I do to prevent bad things happening to the tree.

Thanks a lot and take care everyone. ☘️