Just like there is workout routing to build muscle, here is a one for your path to becoming a PUA.

Week 1: Extended eye contact: When walking along the street or public place, you're going to look at the people(guy or girl) around you or in front of you, never walk past someone without acknowledging their presence. If an eye contact is made, never be the first one to break it.

Week 2: Do the same as week one. At the end of eye contact, try to smile without mouth open or, better yet nod.

Week 3: Do the above plus. Talk to at least two stranger everyday, could be simple as asking the time. As the conversation progresses, if something comes to your head about extending the convo, just say it.

Week 4: Approach women. Do the same as above, plus add a compliment. Don't be too generic, notice something in her. You will have developed this by now with the eye contacts you've been making with people. if you feel a positive vibe when you make a compliment try extending convo, otherwise cut it off. if it all goes great get her number for a hangout. Be sure to declare your intentions asap, you don't want to be talking for 20min and then say you think she's pretty and want her number.

next steps: continue the routine you've been doing. If you can go from week 1 to 4 quickly do it at a faster pace.