Welcome to the addition! I am a new road bike momma just since August. You have gotten some good advice so far. I know for me I walked out of the LBS with my bike, new shorts, jersey, shoes and pedals. I wouldn't say that you have to get shoes unless you were doing a lot of climbing. COvers wouldn't be a bad thing especialy riding on the trails through slush. The internet is a great place to find accessories for cheap. I rarely buy anything at the LBS anymore. They are all overpriced IMO.

Enjoy yourself! Have a great time.