The Mexican driver tested the team's 2019 specification car, the RB15, at a cold and wet Silverstone Circuit.
The two-day test will act as a precursor to the team's run on track with its new RB16B as part of a filming day.
“It's been an amazing day, my first day with Red Bull Racing,” said Perez.
“To look at my name on the car is something extremely special. It's definitely a dream come true.
“I have to say that I am very pleased with how my first day went,” he added.
“I was on top of all the procedures to get to know my boys, to get to know my engineers, just to have a more fluid conversation.
“The way I explain the car is different to what they've been used to and vice versa as well.”
The team spent much of the day completing short runs as well as getting Perez comfortable in the car.
Day two of the test, slated for Wednesday (local time), will see the 31-year-old complete longer race runs.
“We've done a lot of preparation, so many days in the simulator in the factory with the controls,” said Perez.
“I have to say that I'm pleased with the progress we've made in terms of feeling a bit more comfortable.
“I have to say for the first day I felt very comfortable. It's still a Formula 1 car in the end, but the seating position is different, the steering wheel, the grip, the power in it, the power delivery, the torque, it's just so many things that are different.
“Getting comfortable in the cockpit is important so when we get to Bahrain I am able to just focus on trying to get the performance right because with a day and a half in the car, it's really nothing.
“The more we can get done here the better we will be prepared for the first test in Bahrain.”
Following this week's filming day, Perez will head to Bahrain International Circuit for pre-season testing across March 12-14.