Bonsai Newbie needs a mentor...

Just bought this bonsai tree about 10 days ago. I've been doting over it daily and trying to do research online to find out how to care for it. I haven't had much luck tho. I think it may be a Ficus Bonsai but I'm not even sure.

The leaves are getting crispy inside and falling off. I have drenched the soil with water every other day and kept it as moist as I can but maybe that isn't enough? I bought a spray bottle yesterday and misted it. Today I took it outside for some fresh air. Hoping something will save it.
Help!! Please?? How can I save my tree?