I certainly should hope not. I have always found cruises to be one of the friendliest, safe way to travel there is. There is just something about being on a cruise ship that people open up where they don't on a land vacation.
As far as tips you will find alot of advise just by reading through some of these threads. You will get a daily bulletin in your cabin everyday that will tell you the times and where all the activities are happening. It will also tell you the times the different restaurants are serving. The bulletin, (Carnival Capers on CCL) will also tell you when they are having port talks, and important talks about debarkation. When you first get on the ship get a map and familiarize yourself where everything is on the ship. Explore every public area. You would be surprised how some people don't realize until 1/2 way through the cruise that there's more to the buffet area that just by the outside Lido area. Look all around. You will need shorts and jeans, casual dress for daytime, dressier for night (slacks,polos,suit for formal night, or sport coat, dresses, pantsuits. Although there is a wide variety of dress on formal night from sequin dresses and tuxs, to dockers and sports coat. Enjoy the food. Order as much as you want. Don't be afraid to tell your waiter if something isn't cooked properly or you would like something else instead. Your wait staff and cabin steward work hard long hours. The recomended gratuities are automatically put on your onboard account. But it is greatly appreciated if you recognize them with some additional. While most things will be charged on the ship to your account, you will want to take small denominations of money for taxis and baggage tipping.