The fullback is enjoying life under the new Bayern Munich boss and also thanked Philipp Lahm and Franck Ribery for help in developing him as a player.
The trainer was announced as Jupp Heynckes' successor in January and assumed control in June after being formally unveiled by the club's hierarchy.
The former Barcelona boss has a hard act to follow after Heynckes guided Bayern to an historic treble last season. However, Austria international Alaba has been quick to praise the Spaniard for his treatment of the players.
"I'm feeling positive," Alaba told reporters. "The first encounter [with Guardiola] was very friendly. During training he is coaching us players well."
Alaba, 21, was also eager to pay tribute for his rapid rise to older teammates Philipp Lahm and Franck Ribery, whom he credits with assisting in his development at the club.
"Philipp has helped me a lot and I am grateful for this," he added. "He has played for such a long time at a very high level, and right or left he was the best or one of the best players in the world. You can see this season after season.
"As a young player Franck Ribery looked after me. It was him who said 'come here my boy'. He looked out for me both on and off the pitch.
"As I lived in the boarding school, he often picked me up and we went out for dinner. Obviously you are grateful about those things and want to give something back. We get along very well."