Congratulations on the job! Not sure what your personal style is like, but I’d imagine you’d be doing more traditional “city” dress and might want to stick with white shirts rather than blue. I’d probably keep it simple and go with five white shirts, but you’re probably a bit more wiling to use color than I would be.
I’d go with two white shirts (always good to have two, just in case one gets a stain), a blue shirt, a pink shirt and maybe a blue and white bengal striped shirt. Fairly conservative, a bit diverse and easy to coordinate with most suits and ties.