5. You won't wake up with insta-muscles.
I think it's safe to say that if you're reading this blog you've been on a diet before, and I'm sure you didn't wake up to find you had suddenly dropped ten pounds over night. The same rule applies to weightlifting. Just because you do a few bicep curls and eat a can of spinach doesn't mean you're going to wake up looking like Popeye! To get to a bulky or body-builder level of muscularity, you'd not only have to train and diet in an extreme fashion, AND you'd have to keep at it for years. Those types of athletes work extremely hard to look the way they do; you won't end up there by accident, we promise.
If you're still nervous about grabbing a pair of dumbbells, your best bet is to get some personalized advice from a trainer who can tailor a strength training program that works for you. Then stick to it. Guaranteed, you'll be feeling stronger, sexier, and more badass than ever.