This is the only item you will need.  It smokes, grills and bakes.

The Big Green Egg.  Very easy to use.

Also VERY EXPENSIVE! This guy appears to be just a parttime, start up, smoker. Since you’re just getting started, I suggest an Electric Smoker.
 Lowes sells an Electric Smoker for about $120 Bucks. Check it out. Also Bass Pro Shops & Cabela’s sells them as well.
Google Electric Smoker and you can explore all different ones.