There is a ton of good info in the stickied threads at the top of this forum and the Bodybuilding Training forum, but I'll get you started in the right direction:
This is wrong. There are plenty of big dudes that started right into a bodybuilding split, and plenty more who started out as powerlifters. Just ease into it, using lighter weights than you think you should, and increase the weight every workout. If you start out balls-to-the-wall, I can all but guarantee you'll only last around three weeks.
THE FIRST SENTENCE IS BANG-ON except for one little detail; Anywhere between 2-10 reps is fine, as long as you're moving progressively heavier weights. Five reps per set works great for the vast majority.
Also, use ramped sets. Increasing the weight on each successive set, thereby working up to one max set, is the way to go. Focus on rep quality and explosiveness on the lower sets, and just hammer the shit out of it on the top set.
Rest times should be just long enough for best performance on the next set. Don't worry about reducing rest times to increase training density just yet. You're not ready for that.
Add bent rows to that and you've got some damn good compound movements to focus on. Do not try to do all of this in one workout, though. They are too demanding. Your performance on the first one or two lifts would be decent, and everything after that would be useless.
Since you're lifting for aesthetics, go ahead and dive into a bodybuilding split. Read up on good programs in the bodybuilding forum. There are plenty of good ones to choose from.
Do not neglect the body parts not directly trained by these lifts. Get your work in for your arms, lateral delts, calves and forearms. If you don't, you'll be crying the blues later.
I started with two months of Starting Strength, switched to a push/pull split for a little bit (made good gains from both of these), screwed around with some programs that didn't suit me, then settled into a bodybuilding split and I've been doing it that way ever since.
Lots of food. 3g of creatine monohydrate per day. Lots more food. Whey protein powder is easy on the budget and yes, it's food.
That should get your mind tracking in the right direction. Now get to reading.