Mr. Beer kits are BS.
Partial, or steeped grain brewing can make just as good of beer as all grain brewing, you just don't have as many options and you have a little less control/customization. The first Best of Show I ever won in a homebrew comp was a porter I made with extract + steeped grain. It's super easy, and requires much less time, investment, effort, and knowledge, and you can make some great beer.
I would recommend doing several batches of extract + steeped grain brews to learn the procedural ropes, and then consider moving up to all grain with the classic cooler mash tun. Easy to build and way less intimidating than it seems at first.
And remember, when the going gets tough, Relax, Don't Worry, Have a Homebrew!