The 27-year-old took his maiden victory on his 81st start after holding off Ferrari driver Sebastian Vettel in a tense finish at Sochi.
Bottas, who had previously taken 11 podium finishes without a win, described the performance of one of his best races.
"I felt good, but it's a little bit surreal the first win and hopefully the first of many," said Bottas.
"It was definitely one of my best races ever, so it's a good feeling and I am happy."
Bottas admitted that the lock-up he suffered during the second stint at Turn 13, briefly running off the track, hurt his pace in the closing stages as Vettel cut his advantage.
But despite the extreme pressure in the closing stages and the need to lap backmarkers, he insists the stress was not too bad.
"It was OK, the main thing was the lapped cars, trying to get past those," said Bottas when asked about the pressure.
"With these new cars, we lose more downforce when two seconds, three seconds behind, so it was tricky to get close and pass them without losing time.
Read the full article on eurosport.co.uk: First Formula 1 win 'surreal' for Bottas