Here’s a fact: When God calls you to do something, He prepares you for the task. Guaranteed.
David didn’t need Saul’s armor, helmet or sword to defeat Goliath. All those “professional tools” just got in his way. What David needed was to be the man God had created him to be and to fight the way God had gifted him to fight.
God has called you to do something. I’m not sure what it might be, but I am sure that He’s given you the tools and the experience you need. Quit trying to be someone you’re not and simply do what you know. Let God lead, take up your sling and kill a giant.