I have been riding solo for five years. You can totally do this. Practice practice practice the tire change and remember that you will probably forget everything the first time you have to do it for real on the road. If it happens, remember to get well off the road and take several deep breaths and a pause before you start.

The first time I had to change a tire on the road it took me almost an hour and a half, the next time 45 minutes, and I'm now down to about 30 minutes. Since I hate changing tires, I am compulsive about checking my tires before a ride, during the ride if I stop and after, plus if I ride over or through anything chancy I hand sweep my tire or stop and check.

Carry two bottles if possible and stop midway to buy more if possible.

Take at least two tubes, a compression kit and a frame pump plus tire levers and multi tool with you, id and medical info, some money and a fully charged cell phone. I also carry the number of a local taxi company just in case.

Watch the cars,and the traffic, use your mirror and remember the cars are bigger than you so be prepared to give way.

Watch the scenery, feel the road and listen to the song of the wind in your wheels while you enjoy the sun on your face and the smell of the air.

ride long, ride strong.