Become a worry-slapper. Treat frets like mosquitoes. Do you procrastinate when a bloodsucking bug lights on your skin? 'I'll take care of it in a moment. ' Of course you don't! You give the critter the slap it deserves. Be equally decisive with anxiety.
I know it's a rare privilege, but if one can really tackle something in adult life that means that much to you, then it's more rewarding than anything I can imagine.