Hello and welcome to the forum. You have asked for quite a bit, it is a tall order to provide such information in a few paragraphs. Bonsai enthusiasts study for years/decades to learn their craft, in fact it is an ongoing process as is bonsai itself.
Start by reading the sticky threads located at the top of the forum and follow the links they contain, pay particular attention to the comments on watering, no schedule
. You will see two sites referenced repeatedly and for good reason. Read everything there that you even suspect pertains to you.
For indoor bonsai this site is very useful.
Incandescent bulbs are not very good for plants. If this is what you mean by
60W globe for 12 hours per day
I would swap it out for a high lumen CFL (Compact Fluorescent) A cheap timer would not hurt either, I keep mine on 16/off 8.
Also if you want specific advice you will need to be more specific. What species are you talking about? If yo do not know post a few pictures and we'll see if we can identify it for you.
I'm sure more could be said but that should get you started.