i think they will eventually get used to being taken for walks, but if it turns out to be stressful for you both then i would can it.
I took lexie out on a lesh for the first two weeks here every day just in the section to get her used to her surroundings, she had never been on a leash, and she was not too bad really, she did not love it but she did not hate it either, was a bit trying though if she got a scare and she is the scaredy cat kind, she would bolt and nearly get strangled, but needless to say we both survived it, and i dont regret doing so, she is now very comfortable in her new surroundings without the leash,. good luck.