The Cameroon international saw multiple offers from United turned down before the start of the season.
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"I feel more relaxed now," the 22-year-old told Sky Sports.
"The noise about me outside, I didn't understand. I didn't look on the websites. I'm more focused on me, myself and for my team-mates."
Baleba also said: "All my qualities, I need to improve on that.
"The most of the qualities I have is I need to enjoy more football, because when I play, I'm so serious that I want to do the right thing or to do the proper thing on the pitch."