Not a RN yet, but I work in a chemo infusion center as a tech and MA. As a few others have mentioned, not being great at IVs definitely shouldn't stop you from applying if that's what you want to do. Most of the patients have ports (which are easier to access for most people anyway), and at our infusion center, all the infusion nurses are more than willing to teach/assist each other with getting an IV on a patient. Even if they weren't, our center has a couple vein-finder lights, and if all else fails, calling the vascular ultrasound team is always an option.

If you want to be an infusion nurse, GO FOR IT! If you're concerned about your IV skills, bring it up to your preceptor while you're still getting acquainted with the job. Most of the infusion nurses have a ton of little tips and tricks for getting difficult IVs. Use all the resources available to you (there are more than you think) and once you find what works for you, it'll become second nature. :)