I am using a bigger breast serum from www.4biggerbreast.com to firm and enlarge my breasts. I went from an A cup to a B cup within 1-1/2 months. Since it's topically applied, there's definitely no side-effects. I recommended it to a lot of my friends and they are very positive about the product.
Grace / Easternjewel is a spammer advertizing for 4biggerbreast, she is not a regular on this board, she just showed up recently and started shamelessly advertizing to inexperienced newcommers with her fake testimonials. She always posts the exact same thing. Please don't be fooled by her, the product she's advertising has gotten extremely poor feedback here.
Oh yeah and about your questions, you have to make a lot of reasearch to be successful in NBE. It's all on this forum, we have info pages on the main page, also use the search function when you have specific questions. The first thing you need to learn is about hormonal imbalances and figure out which one you have. There is a questionary test in the newbies section.