I absolutely agree with the others that making a phone call is the best way for phone calls to become easier as you tackle each one. However — there was a time where the phone was an insurmountable obstacle for me and I would use a relay phone service (typically for deaf and hard of hearing) if I had no choice but to make a call. If you’re in the U.S., this is a free service, paid by federal funds. Most popular service: https://purplevrs.com/ It’s there if you need it. I’m glad I had it available when my fluency was in a terrible place. I wish you the best!