Dom: Don't know if you live in a urban or rural area, so you might have to do some searching to find a place to learn the proper Olympic forms. A little rare now days. If the only option is to learn them on your own, than there are web sites, video's, books, etc to help. Hint; start with a bar only, at first, to learn the correct form. You will also learn the find the correct groove when lifting. Watching yourself in a full length mirror is also important., to checkout any flaws during the learning period. Of course a coach would be the first selection. Might try local colleges or high schools, they might have classes in lifting.
There is really no best way, but the one that works for you. If you do the Olympic training, you will add impressive strength (and confidence) and muscle. Though the usually 2's or 3's can be boosted up to a more BB'ing protocol of 6 to 9 reps, if you wish. And making sure the diet is enough to support the extra demands for gains to your body.
The other selection would be the 5X5 system (5 sets of 5 reps each), as a basic way to increase size & power. Only use the basic compound exercises, like the squat, BB row & bench (in that order)each workout. Throw in a couple sets of arms, if you wish, at the end of the workout. Try for the mon-wed-fri, or twice a week plan. Same for the Olympic protocol ,per days a week. In any event, try not going to failure on any exercise or set.
Olympic lifters do a form of DL's when they pull the bar from the floor. Only they raise the bar higher, in one motion, to snatch it overhead or catch the bar on the shoulders for cleans. The Olympic lifters pulls are lighting fast compared to the Pl'er slower efforts. Speed will increase basic strength in training. Timing & quickness is another element that separate the Olympic lifter from the PL'er. On a whole, Olympic lifters tend to be more faster & athletic than P'ers. Not sure if any Olympic style lifters have tried serious DL'ing, but I would not doubt that many could be in the top 10% of PL'er in that lift. Good Luck.
Side Bar: Most men find that if training for the one hand DL's, they can raise almost as much as they do in the two handed version. But than again, the DL's is more of a leg driven exercise than anything else.