Hey Bob,
Welcome to the website. I'm sure a lot of PUA's started with the same feelings and thoughts you have right now. I know I did in quite a big part. I know some things came natrually, I just am very insecure about my looks.
What I want to tell: everyone has their background and reasons to be insecure. Reasons not to act they actually would love to act.
As Style said: don't be yourself, be your best self. Live your life with no brakes. Brakes are for vehicles, not for humans.

*just realised I bought 2 new bicycle brakes so I just had to make that addition LOL*
Enjoy, have succes, grow and most importantly of all: have fun.
Too bad I don't live in London anymore, used to live in Chelsea and near Barbican/Fabric. Meh I miss that place.
-Steven.