Welcome to the forum and welcome to reloading. Thanks for asking our advice.
Welcome, jahmes143,
You will want a small piece of lumber to take the impact, so you don't dent your coffeetable or whatever. You will want a mallet (NOT a hammer) to drive the Lee tool. A wood mallet, rawhide, hard rubber, plastic or even brass. You don't want to hit the Lee tool with a steel hammer or you will eventually be peening the tool and shortening its life.
The Lee tool comes with only one dipper. You will probably want a full set and a scale so you can tailor your loads or take advantage of different powders which your one dipper would not allow you to use.
Ultimately, you will probably want to move to a press and regular dies, as the Lee tool is noisy (smacking that thing with a hammer for a couple of hours gets on your neighbors' and roommates' nerves eventually-heck, it got on MY nerves, and I was the one doing the smacking!) and SLOW.
The Lee Load-All (also known by other names) is an excellent way to get started and, if it fills your shooting needs, can satisfy you just fine, as it does for many shooters.
Good Luck. Always wear eye protection (especially when working with primers). Be safe, always, all ways.
Lost Sheep