Well as im a beginner myself i'll give my own imput. I would never consider using pickup lines or even think too much about the whole "process". How do you start? Well i never "started". It doesn't start i don't think. It's a gradual thing that will get better over time. How quickly you adapt and learn is up to the individual.
In my opinion the best method is your own. Just follow the tips of what not to do, and the "what to do" you can do yourself. Which is hit and miss, and you'll never know unless you try. I have yet to go out in broad daylight with the intent of picking up girls. However, i'd still man up and wade in.
I am self conscious and go bright red quite often which makes me go within myself and clam up. Yet is this enough to prevent me? No. It's a mindset. You CAN turn it off and on. It takes practice. I can go loud and confident, but that's because i allow myself to do so. Which am i? Shy and quiet? Or loud and confident? Both is the answer. I blend the two.
How i think in a given moment will decide who i am. If i'm bricking it when i approach, it prob will show. No pickup lines will work if i'm fluffing the lines because im nervous. Instead, i'd use the nervousness in my favour. Look for a way in, perhaps she might say "awww sweet" which is enough to go on. I think more important than what is said, is the mindset you have. Realizing what is positive and good, and also what is negative and bad. So for example:
I think to myself "look up! look around!"(+)
And i follow through with my actions. I do as i think.
Why? Because my desire to do so overrides any fear i have of not doing it.
I see girls. I think "look at her! Don't stare! Just look!"(+) I do as i think.
My thoughts? "Damn she's hot!(+) I wanna chat to her (+)....Oh wait! She'll shoot me down straight off the bat!"(-)
Why? Cause i'm playing it safe. My mind has been conditioned to settle for less cause i don't deserve or am unable to get a girl like her.
So at this point i have a choice.
Either stand there going back and forth between the + and - in my head. I'd convince myself i'm worth it(+), and then counter with a -. All the while this battle is going on, i'm still standing there!
Or......
As soon as you think the negative thought of "She'll shoot me down straight off the bat!" wade in! Yep! Your desire to look up allowed your body to follow through. Now you move you feet and head to that girl. Your body doesn't have time to shut down if your mind isn't battling away with itself. All you have to recognise is the positive of every thought. And act on that. Don't even give those negative thoughts a second chance. Your pushing through your fear. I've tryed this before and i found myself laughing as i did it because i realised the idiocy of my own mind.
Feeling uncomfortable? Well feelings are different than your thoughts. Can't always switch your emotions off straight away. Though how you think affects your emotions, so stay cool and calm in your mind, and eventually you will relax.
You say your a newbie. You'd be suprised of how quickly you can grow when you simply apply the everyday interactions between other people you have contact with, into the "pickup" zone.
Well i do stand corrected on anything if i'm wrong. This is just my present opinion. Hope it helps someone.