"Camp" in your driveway if possible a night or two and learn how to use everything, except maybe the toilet
By doing this, you will also get a good idea of the things you want to get for your trailer to leave in it on an permanent basis, and what you will put on each trip. Things like dishes, pots & pans, paper product, linens, etc can stay on board all the time. Food items or bathroom toiletries should be loaded on an individual trip basis.
Ask anything you need to. That is why the forum is here. There is also a huge amount of information already here, but if you don't want to spend time searching for an answer to a question, just post a new one.