I have never used a Mr. Beer, but I am also a Newby, having only 2 brews under my belt. I would recommend trying out a regular extract kit.
The hardware needed is easy to find and not very expensive. Chances are, you already have some of what you need. The directions that come with extract kits are very easy to follow and self explanatory.
I got lucky because my dad had all the buckets needed from years ago, so my capital costs were non-existent but I have seen everything needed at low costs.