I am having major anxiety over one of my classes in school. Because in ROTC they expect you to step up and be a leader and I am more the quiet in the back type of person but I really want to step up and have more confidence, so I pray to God to give me the strength to step up and have courage and self confidence and do it.
I am of a similar personality to you & I find reading Phil 4:13 helps me in situations when I need confidence. Hope all goes well for you.