That's a great start. Getting baby to suck at the breast is your first hurdle. The next will be getting your supply up and cutting the bottles.
It is doable, but I stress again, you need real-life support. Give the ABA a call. They can offer you some great support and advice specific to your situation. A visit with a private LC would be gold - she can walk you through the whole thing.
Give yourself a little time and get some help before you make your final decision. It's ok to do a bit of both for now