There are tons of places to eat.
Ralph and Kacoo's in the quarter is almost always good. Not overly pricey. You can certainly find other places that are more expensive.
The Court of Two Sisters does a mean champagne brunch iirc.
I always enjoy walking around
Audubon Zoo. And I almost always take a ride on
The Natchez.
It's been quite a few years since I've been down there for some fun, but if things haven't changed too much, I always start my trip out at Jax Brewery. They have a parking lot you can park for $, if you have a car. It's right by the river, and there's a little trolley type train that you can use somewhat to go up and down the riverside to save a bit of walking. Across Decatur Street leaving Jax, you can find Toullouse Street (where Ralph and Kacoo's is just a short walk). Couple streets northeastish, and you find the square. Back towards the river and a bit further northeasterly, you find
Cafe du Monde. And if you keep going northeasterly, you will eventually get to the French Market. There are lots of things along the way.
Bourbon St has a lot of bars, usually music, and novelty stores. If you have kids that you want to avoid "sexy" stuffs, be prepared it will be hard. Lots of the novelty stores have "adult" stuffs on display, and it's not unusual to see a nekidish person walking around the streets. Bourbon St. is also about 3 blocks from Jax, up Toullouse. Hopefully you get a nice map to help you get around.
Also be prepared for scammers and bums. Stick to the main roads and don't venture off the beaten paths. There are some streets and alleys you don't want to venture down
Daytime is usually pretty tame, but at night the vampires come out.
I hope you have fun. It's a fun place.