First time smoking brisket, need advice?

I purchased my first smoker this week (Masterbuilt electric) and I am planning on making a brisket this weekend. I've got almost everything I need to know down pat, however one thing I'm not sure about is injections. I see some people injecting their briskets, and some people don't. I have heard some people say that every competition smoker will inject their briskets, and others say it's not for beginners. I'm just not sure whether I should or not. I'm not looking to make some sort of crazy brisket. I just want your basic tender, juicy, smoky brisket. I also don't want to end up with something dry and uneatable. Any advice on this is appreciated. Also, any tips on smoking liquids (water or juice), also if and when to wrap a brisket is appreciated.