Few easy steps I've been following.

Some factors you need some luck:

- Have at least 6 inch cock. Preferably 7 to 10 inches.

Some factors you need some motivation:

- Study to get a job that pays above average. Cut off unnecessary expenses to save money.

- Go to the gym, workout your body (very important). Shave your cock and keep it clean.

- Be confident and look wealthier than you actually are. Don't wear cheap clothes. Go only to premium clubs and restaurants (I don't mean splurge, but premium. They are not that expensive if you do that twice a month or so). Those clubs often have "gold diggers" you can easily mislead. They're often very good looking too (plastic surgery etc.)

- Use Tinder. Tell the girls immediately what you're looking for to not waste your time on difficult girls.

- Always mention that you love blowjobs.

- Travel a lot. Your role is much easier to keep up abroad. Just get an above average hotel for the time you want to have company. Also prefer countries with below average income.

- Meet escorts. There are several really sexy girls doing escorting for reasonable prices. Just make sure they do blowjobs without condom. Throw few extra bucks to get your fantasies fulfilled. Remember to be a gentleman, as the scene is rather small. The nicer you are, the easier you get girls later (and for a better price). 

- Younger girls are often easier, but not always as open minded than mature ones.

- For good head, look for plumper girls with beautiful face.

- Do not have a relationship unless you are willing to cheat, or your gf is very open minded and lets you have sex with other girls (or likes threesome).

- Avoid hookers. Its often tempting to get a 7 head group blowjob for less than 100 USD when you go to Thailand, but it's not often worth it unless you can be absolutely sure the girls are clean. Again it's better to pay a little more to get premium service and build up contacts.