You can be angry about what happened and still choose what happens next. Both can sit in the same chair.

Anger gets treated as something that has to be resolved before anything else can happen, so people wait for it to clear and lose months to the waiting. It does not have to clear. You can be entirely furious and still make a decision about tomorrow, because the two draw on different parts of you. Forgiving, understanding and moving on are not prerequisites for acting.

Decide one thing for the week ahead while still angry, and do not wait to feel better about it first. Sign up, send the application, turn up to the session. Let the anger come along rather than making it the thing you handle first.