Call and hang up. Call and say hello and hang up. Call and say hello and ask them when they close… Etc… The point is to desensitize you to phones and talking. The phone, and fear of it, was the single most limiting habit I had in my younger life. I recommend you do whatever you can to make sure you don’t share this experience. (Or DM and call me and practice if you want. I won’t care and you’ll get the experience as well.)