Experimenting is crucial to developing a workout program that works for you. While you are experimenting it is good to keep a journal of what workout routine you are experimenting with, what supplements you are using, how much calories/carbs/protein you are eating, what your body weight and body fat % are after every week, any increases in your lifts, etc. This will allow you to keep track of what is working for you, and what isn't. Bodybuilding.com also has a great measurements chart, which you can use to see if you are making any increases in size.
You may need to experiment for a long time before you really find something that gives you great results. You should try a new nutrition program every month, or whenever you feel it is best, e.g. One month you could eat 3500 calories, and 250g of Protein, then the next month you can try 5000 calories with 200g of Protein. Once you find out what type of nutrition your body needs for the best gains, then move to your workout routine. Try a High Intensity routine for a month, and record your gains in your journal. The next month you can try Max OT, and record your gains in your journal. Keep trying a new routine, until you find one that gives you great results. Remember to modify your workout every 4-8 weeks so your body does not become accustom to your routine and stop letting you achieve your desired physique. Supplements also need to be experimented with, not every supplement works for everyone. Creatine only works for 70% of the people who use it, so don't just assume that it will work for you. You may want to try a new supplement every 6 weeks, and see how your body reacts to it. Whatever gains you get from it, whether they be good or bad, write them down in your journal. When you find out what supplements give you the best results, you may want to start to stack them. When stacking the supplements that you know work for you, you should see optimum results.
Now that you know what type of workout and nutrition your body needs, your body should be growing like it never has before. So give it a try, I promise you will not regret it.