The 20 year old made his competitive debut for the Hoops in defence alongside Daniel Majstorovic.
The Kenya international was aware his new team-mates were losing confidence as the second half wore on and St Johnstone held firm.
"It was very disappointing to lose on my debut," he said.
"When they scored the fans wanted us to play better and that's when the confidence of some of us went down.
"The crowd wanted more but we couldn't handle it so we need to work on that.
"The manager was disappointed after the game and that is normal because we didn't do that well.
"We played okay but we didn't take our chances, that was the only problem.
"At home we can beat anybody but we were unlucky."