I've been doing this for the past 3 days... and yes, it does change your life. Because once you've approached that 1st girl, the rest of the day it's SOOOOO much easier to approach more when you see other hot girls. Cause you've just jumped in the deep end and basically instantly state shifted (if you went direct, that is). And you'll stay like that for the rest of the day, until you go to bed.
But it's hard... very hard to not listen to the excuses that come up and just go fucking do it.
"Nah man, I'm not in state yet, fuck that"
"I'm not approaching that 1st girl because I just woke up and need to get some coffee first"
"No dude, fuck that, I'm on the subway, everyone will hear! It's too high pressure... I'll just wait for the next girl that's on the street"
"Noooo, I can't it's 2 girls, the other one will cockblock me..."
Though you have to remember one thing... you do the 1st approach that day, not to get the girl... but for yourself, to be able to feel like a man who goes after what he wants.