"I want to be able to do one pull-up." This is common goal I get from people doing my online and in-person training, especially with females. Being able to do pull-ups is a great measure of upper body strength. I've heard it framed before that pull-ups are for your upper body what squats are for your lower body. Maybe, maybe not, but no matter the case, being able to do pull-ups will boost your upper body strength and do for your arms what doing a million curls can't do.
Check out this article from stack.com called Do Your First Pull-Up. It gives you an 8-week guide on how to either get your first one done or increase the number of pull-ups you already do.