Confidence isn't a personality type. It is the belief that you will handle things, and that belief grows from experience.
Start smaller than you think
Set a task you can do today: say good morning to a neighbor, ask a barista how their day is going, or give someone a sincere compliment. Small reps add up.
Shift attention outward
Anxiety keeps your attention on yourself. Get curious about the other person instead. When you are listening properly, there is less room to worry.
Expect some awkwardness
Everyone has awkward moments. Most people forget yours quickly because they are busy thinking about their own.
Keep promises to yourself
Self-respect grows when you do what you said you'd do. Training, sleep, and work habits all give you proof that you can rely on yourself.
Know when to get help
If social anxiety is stopping you from living your life, a licensed therapist can help. Getting support is a practical step, not a failure.