Are you doing one test or two? Honestly, if you haven’t shown in a while and are at all nervous, I would say to ask someone to read for you. Memorize your test, but have that reader there as a backup, just in case you step into the ring and your mind goes blank. If it does, don’t worry, it’s happened to all of us
I’ve been doing Intro this year with my 4YO–they’re not expecting perfection, just a steady, accurate, consistent test. None of the transitions are at a letter, they’re between them, so work on preparing to transition at the first letter so you have a stride or two to do it, so you can do it correctly–between C & M doesn’t mean at C, take your time getting a nice trot transition. There aren’t a lot of movements in the Intro tests, so use all that time you have between them to make sure they’re correct.
Also don’t sweat turnout. Just be neat and tidy. It doesn’t have to be matchy-matchy and sparkly. At schooling shows this year, I’ve seen a lot of folks in colored breeches and polos, so don’t feel like you have to roll in looking like a bedazzled StayPuft; it seems like the all-white days are over, especially with the new attire rules.