I love it when folks who are mechanically competent tell someone who is not that its easy. My wife told me I could do plumbing for 10 years. I would try, visit home depot four or five times, cuss at the pipes for a while and then call the plumber. We now save 5 hours and just call the plumber.
I would not recommend to someone who is uncomfortable in doing the install to do it. Hopefully you'll get some good referrals

Best of luck and enjoy your cruise.