Congrats on the new RV and
to FRF. Any questions you have there's plenty of helpful, knowledgeable people here to ask. I'm sure plenty others will reply as well so I'll start with Spray your seals on the slide out to help them last a long time. There's a couple manufacturers. Camping World sells them.
One of the most important things to remember. Walmart sells quite a bit of RV accessories cheap. Including toilet paper.
Have a great time with the new RV.