Welcome! Your brooder is a good start, and I do hope it has a cover too. If you've ordered any bantam chicks, they will likely get through those 1" wire openings, so hardware cloth would be best for them.
Make sure that your post office knows that chicks are coming, and that you want to be called immediately when they arrive! Visit in person, with your phone numbers, soonest.
Then, plan to have everything up and running, and get them right away.
I do hope your coop is ready, and if possible, have them out there in two or three weeks max. NOT indoors!
The only extra that I might use an electrolyte mix, for a couple of days, if they are stressed on arrival. Otherwise, good chick starter, fresh water, and dry bedding are what you need.
Have a plan if your electricity goes out! It's happened here, and just have that friend or relative warned and willing to 'chick sit' in an emergency...
Post pictures! We all love pictures!
Mary