Attract sponsors to go pro. The more competitions you win and the more your physique starts to speak for itself, you'll need to start attracting sponsors, essentially going pro. This means that you'll be able to make money to train full time, without having to worry (at least as much) about doing other things to fund your bodybuilding. This is the dream that every bodybuilder works toward, and it'll only be available to a select few, with the genetics and the effort to make their bodies into Olympia-level physiques. Keep working toward this.
Shorter rest periods have their place — especially if your goal is muscular endurance and fat loss. But longer rest allows you to perform more reps on subsequent sets, and this greater volume, over time, may lead to greater muscle gains in the long run. One convenient way to do this without tacking additional time onto your bodybuilding routine: Perform supersets, which are back-to-back sets of two different exercises that target non-competing muscle groups (e.g., the squat and biceps curl, or the bench press and bent over row).
Take the time to learn the movements and you'll set yourself up for a long career of continued success. Begin with body weight, then progress to a broomstick, and then work your way up to a bar. After that, keep feeding yourself more and more weight. If your technique isn't perfect with no weight, then it makes no sense to keep adding weight to the bar. Once your technique is perfected, the sky's the limit.
Do a single set of repetitions. Theories on the best way to approach weight training abound, including countless repetitions and hours at the gym. But research shows that a single set of exercise with a weight that fatigues your muscle after about 12 to 15 repetitions can build muscle efficiently in most people and can be as effective as three sets of the same exercise.
After session 12, consider whether you need to increase the weight for any particular exercise. If you can comfortably do more than the RM of 12 exercises, increase the weight by a modest amount, say two pounds or a kilogram for isolation exercise muscles such as triceps and biceps, and 5 pounds or 2.5.kilograms for compound and large muscle group exercises like squats and deadlifts. When using dumbbells, this would apply to each one. Don’t increase the number of sets beyond 3 at this time.