You could, and if you want to learn this, we are not going to talk you out of it. That instinct is the right one and we would rather feed it than fight it.
But price the hire honestly. A freelancer good enough to trust with the account does not do creative, so you are sourcing that somewhere else and stitching it together yourself. A buyer in-house is a salary, and the salary is not the whole cost, because you are the one who has to find them, brief them and manage them, out of hours you have already told yourself you do not have. Put that against $2,000 a channel, senior people on the account from day one, and creative and landing pages there as add-ons when you want them, and see which one you would rather pay.
Either way, we teach while we work. We would rather be the reason you can eventually run this yourself than the reason you never learned how.