WaldoFollowing a build guide when you have no clue what's happening is the #1 best way to continue having no clue what's happening. Furthermore, 99% of guides for good builds will ignore levelling/budget gearing, which confuse the hell out of new players (I spent part of Breach "introducing" someone to the game). Unless you have someone more knowledgeable about the game sitting in mumble explaining everything constantly, you'll make just as many mistakes following a build guide as you would on your own, except you'll have no clue why.
No matter how bad of a build you end up making it'll get through merc and low tier maps if you're not retarded, and you'll get a reference point regarding what content/archetype you want to play.
If anyone's looking to get into the game, feel free to add me to ask about stuff, I'm pretty much done with the current league but I've played almost everything at some point or another.
There are many build guides catered to beginner players that specifically mention why they use the things they do. Sure, talking to someone who knows the game while you're playing is probably the same, but you aren't giving good guides enough credit.