If your not familiar with necessary technical aspect of painting, I suggest you'll start your study to that. What kind of paint you are going to use? Do you know how to mix paint? Do you know how to apply paint (there are proper ways)? Do you know how to use paint? If not or in doubt, concentrate on these so that you will not be hindered by these technical aspects in the future.
For this practices, a still life is usually a favorite choice. Your subject does not move. You can arrange your subject however you like. You can leave them and expect them to be the same when you came back. You could paint them in the comforts of your own home. Your subject does not get angry or bored, and they does not ask for payment.
After that you may try venturing off other advance techniques like paint sculpting, color washing, and chiaroscuro and try more demanding subjects like portraits and landscapes. You may also like to study anatomy (make drawings and sketches or small paintings) of people and animals, especially if you like drawing them. Also certain techniques like washes and glazes so that you would be able achieve more effects.
Of course take your time. These things can't be done in a hurry. Just enjoy your journey and you'll be surprised by the distance you have traveled.
As for inspiration, see this artist journey in art from totally crapy beginnings to totally awesome present.
Journey of an Absolute Rookie: Paintings and Sketches :
http://www.conceptart.org/forums/showthread.php?t=870&highlight=journey