As Danny says, you'd be better off starting with Chicken or a nice Butt. Brisket will have you cursing and is likely to Jade you from smoking at all ,which would be ashamed.
Starting out Smoking is like taking your first steps . Start small and take little steps. You need to learn your Smoker , it's operation , heat control , how to season it (like an Iron Skillet) , the best fuel for the job , food handling safety , cuts of meat and the
proper cooking techniques of each type and what smoke does to meat (Creosote , Smoke color for best results ) and incorporate all this into practicing the skills.
I'm not trying to scare you , just as in any job , you need to learn certain things. In BBQing , however the learning is fun and productive. You must Practice on one type until you get comfortable then move on to better things.
Practice and learn patience. Those are the two most used skills you'll need to BBQ confidently.
Have fun on your journey through BBQ Nervana , and as you go . . .