zaxroots: Based, on your question, it sounds like a lesson or two with a good teacher might be your best bet. It could save you a lot of frustration and wasted money on reeds. It is still true, as Canadiain said, that you need to experiment. Here are a few other thoughts:
1. Reeds with the same hardness number on the box are not all equally hard. It depends on the cut. For example, go to the product section of the Rico sight, and you will see a hardness comparison chart (in the upper right).
2. I was not aware of the tip profile differences that Canadiain mentioned. At any rate, in my experience some American mouthpieces play great with Vandoren reeds, others with Rico Jazz Selects, and others with either Alexander or Rico reeds. So if you're like me, foreign vs. domestic may not be the deciding factor for you.
3. A recent poll of SOTW members showed that the overwhelming majority of poll respondents use #2 1/2 or #3 strength reeds. If you're like most people, that's where you'll wind up. If you're really new to woodwinds, you might try a #2.
4. Reeds and mouthpieces are both optimized for a variety of player goals. If you are new and you have some budget, then you may want to also take a look at what mouthpiece you have. Some are better than others for beginners. The few teachers I know all recommend rubber pieces with "not too big of a tip" to start (and probably not too high a baffle either). I'm sorry if this is off point, but it is another thing you might want to discuss with a good teacher.