Of course you can do a 30-miler. All you have to do is get some miles under your belt.

I'd like to +1 the following: bmccasland, makbike, and zencentury. You just got that new road bike so make sure that you two spend some quality time together. Hit the trails in the area. You have a whole year but I really think you'll hit over 30 miles in one ride this year with the new bike. As long as you give yourself enough time to get use to the new road geometry and find the happy place with your saddle and shorts you can do as many miles as you like given enough training. Check the VeloDCity Meetup group. They have a lot of no-drop rides throughout the year and are a great way to get familiar with the area. Just ride. You'll hit 30+ in no time.