Sorry about the bad grammar on the last post I hope this is a little better but grammar was never my best subject.
I own 2 majestic brand pick guns and have another which I don't recall the brand of at work, and I also have an HPC Electropick. However, unless those are the main ways you intend to open locks they really aren't any easier than picking the locks manually.
I highly recomend that you get several different locks padlocks(get several different brands masters are usually a good starting one but just too easy get some Abus and American and also some cheap ones, sometimes they can be a headache because of the small keyways). Also, get some knobs and deadbolts(a lot of stores will sell damaged ones real cheap, and unless you plan on using it on a house afterwards who cares what the lock looks like. Start with something easy like a Kwikset. Next I would recommend moving up to Schlage and Yale, then whatever you can find with narrower or more complex keyways.
Also try picking plunger type file cabinet locks the tensionpushing against it can be difficult to overcome(there is an easy method to bypass it without damaging the container or lock but it isn't exactly picking so I wont discuss it here). Start out by using an ordinary hook pick when you are learning the fancy stuff has its own time and place but not for a beginner it realy isnt any easier anyways.