We most often notice these mistakes made by customers when choosing a road bike.
1. Wrong size
You can replace various bicycle components, but replacing the frame is expensive. You will definitely not get used to a bicycle that is too big or too small, because it is like wearing shoes that are the wrong size. Don't be tempted by a low price, especially for a large bicycle, if you are short.
2. Not knowing what type of bicycle you need
Just because your neighbor says that a road bike is perfect for them doesn't necessarily mean that it will be right for you too. Consider where you plan to ride. If you ride on gravel and forest trails every day, a road bike is probably not the right choice for you.
3. Failure to test a bicycle
Most bicycles look nice and comfortable, but the geometry of a road bike differs from other bikes. Be sure to try it out to see if the size is right for you and if it's fun to ride.