What the best build would be for you kind of depends on what you want your character to be able to do. Although, as someone who's only been playing GW for a couple of months, I know what you mean about being overwhelmed by all the info at the very beginning.
If you want your Paragon to be a major damage-dealer (i.e., if you want to be the crusader or "hero who saves the world" in your party), then you might want to try Warrior, Ranger, or maybe even Monk as your secondary. The first two will give you support for up-front whacking at enemies (for example, Warrior gives you shouts that buff defense or attack, and synergize well with Paragon Command/Motivation skills, or Ranger gives you access to skills that can add conditions to your attacks, like Apply Poison, and the ever-useful self-heal skill, Troll Unguent). Monk gives you a reusable resurrection skill (ALWAYS useful, but especially if you are new to the game, or prefer to play with henchmen/hero parties), as well as reliable healing, buffing, and smiting skills.
If you would rather play a support role in your party, consider Monk, Mesmer (although I wouldn't recommend a Mesmer to a newbie, cuz they are one of the more complicated classes to understand and play effectively), or Elementalist. Monk, again, for party-wide healing and buffing that synergizes with the Paragon's abilities in those directions. Mesmer can contribute interrupting or enemy shutdown abilities, and Elementalist can add AoE (area of effect) damage with fire skills, high damage to single targets with Air magic, snares with Water Magic, and damage or defense with Earth.
I will let others offer advice on Dervish, Necromancer, Assassin or Ritualist secondaries, cuz I don't have much experience with them yet.
But what it really comes down to is.....there isn't a WRONG way to make your character.
Talk to all of the profession NPC's in Churrhir Fields, and try out the skills they give you for free. See what seems like it would be a fun combination with your Paragon abilities, and mess around with it for a while before "officially" taking it as your secondary. You may not have realized, but you can run around in Churrhir Fields trying out different secondary skills FOR AS LONG AS YOU WANT, just don't tell First Spear Dehvad that you "officially" want a particular profession as your secondary until you're ready.
And also keep in mind, if you pick something that sounds like a lot of fun, and later find that it doesn't work as well as you'd thought, you are NOT locked into things forever. You'll only have to go through 4-5 missions before you will be given a quest that will eventually unlock the ability to change your secondary profession, so don't think you're stuck with just one forever.
The same is true for allocating attribute points. If you put a bunch of points into, say, Motivation, and later discover that you're using Command skills much more, just go back to any town or outpost, and take the points out of Motivation and put them into Command.
The character creation mechanics in this game are REALLY flexible, which is wonderful, IMO!!!
