Advice. How do I become more of an extrovert

Im 28 years old (soon to be 29!) and single. I really want to get married and have kids. I grew up in a very conservative Asian household. We always had to speak right, get good grades and never got into any trouble. I have a pretty successful career but also a lot of free time, mostly as a loner when at home. I have friends, half of who are 28 year old virgins and pretty nerdy. I've only ever slept with two men in my life. One was a long term relationship. The other I met at a bar and he broke my heart after 8 months. I'm pretty shy and usually the one getting bullied.

I think that I'm not interesting enough and dont really know how to socialize with people outside of my comfort zone. I want to be more outspoken. I don't like being shy. I'm 5'1 and about 110 pounds and want to get breast implants to improve my image. I look to much like a nerd and when I go shopping and try on new clothes, it makes me so nervous I won't buy them. I don't know how to hold a conversation outside if work topics.

How can I force myself to become who I want to be??? I feel like I don't really have any support around me.