I would advise my younger self to not look for the job to grow on me, to become something like able.. look at it as the opportunity it is, to learn and gain skill.
Tell yourself every night that you don't need to like it or to feel confident. You're getting up in the morning to face the challenge and on the worst day you're still building skill and experience. Think of it as an investment in yourself for a career that's still ahead of you.
Those office jobs by the way are 1) also attractive to nurses with experience 2) not all that you might think they are, with experience they will always be there, without experience your options will narrow.
What you're doing now is essentially an internship, that you're being paid for to your benefit. If you can think of it like that versus not liking it, you can let it work for you.