The phrase "increase my confidence" is correct and usable in written English.
You can use it in a variety of contexts when you need to express that you want to feel more confident in yourself. For example: "I am hoping to increase my confidence by taking a public speaking course."
People said the Old Firm match last week was abysmal, but I saw nothing that would increase my confidence about getting a result.
The response options included: "health reasons", "to improve my appearance", "to increase my confidence", "to increase my physical fitness", "to achieve my ideal weight", "currently overweight", "to feel better"; "to fit into my old clothes" and "other".
It helped increase my confidence for dealing with the media and helped me to prepare for a radio interview that I did with the Kenya Broadcasting Corporation's Health Program on menstruation in informal settlements".
It would be feedback from clinicians, because it seems as they're the one that's sort of assessing or marking or supervising us and whenever I get a good feedback from a clinician I would feel as though I've improved and that would increase my confidence.
It won' t increase my confidence, because I need to see the crowd around me.
Participating in JSI increased my confidence and willingness to explore other career fields that fall under the public service umbrella.
Looking at my illness, not purely through the eyes of a sufferer but, with an investigative approach, has increased my confidence.
"I'm excited to be here because this is a really good hockey team and coming into this team has increased my confidence level.
Afterward, the President praised Gonzales for his "very candid assessment" and said that it "increased my confidence in his ability to do the job".
