I'm self employed and use a car that is under my dad's name but I am the only one that uses it. Can I deduct miles/gas? Do I need to track my miles throughout the year?

From what I've found, I can't deduct miles since the car isn't under my name but I can deduct actual out of pocket expenses such as gas and maintenance. Will I just need to keep the receipts for those? Also, do I need to keep track of how many miles I have driven throughout the whole year? Also, if I deduct it with actual out of pocket expenses, will that mean I have to keep doing it that way in the future?