Can we consider that the Renaissance is a rejection of the achievements of medieval culture?

No, the Renaissance was part of the culture of the late Middle Ages, namely the XIV-XV centuries, if you take Italy as an example, where the Renaissance lasted the longest. During the Renaissance, the Romanesque and Gothic styles were preserved in architecture. In addition to the culture of the Middle Ages, there were innovations associated with humanism and philosophical thought.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.