Don't worry, we all started out knowing little and progressed from there.I am a Bonsai novice so have no idea what I should be doing with it at the moment.
There are some things to be aware of but after a while day to day care becomes second nature, don't panic.Everyone has told me they are so difficult to look after that I am paranoid about making any changes
I'm going to agree with Marsman here, yes it needs re-potting but not until spring. You have some time to learn about this so I won't go there now.I don't know whether it needs re-potting or not?
These trees really should have a dormancy period. Do you have an unheated space that is sheltered? Perhaps a shed, garage or does a friend or neighbor have a greenhouse? Also, it will do much better outside during the summer, but again that is not an issue right now.
Definitely not a problem, I allow mine to go completely dormant during the winter so a cool windowsill is not an issue.I don't know whether its too cold on the window ledge?
Norm