So people seem to be struggling with getting a girl at the start, so I've made a mini-guide on how to recruit girls effortlessly.
First, you've got to investigate. Unless you want to reach 100% on the investigation chart, you only really need to worry about four options: Treasury, Academics, WETA and OB/GYN. Girls always have one trait to them, and that trait will change one sentence in one of the hack results, with two exceptions where all four will have default results. These traits dictate how you go about recruiting the girl, and finding out the best recruitment method will cost you between 50-200k. I recommend doing WETA before any of the others, as each of the four hacks have two skills related to them except WETA, which has four, so you're more likely to get a result if you do WETA first. Also, this may be bias talking, but I found OB/GYN traits to be less common than Treasury or Academic ones, so do that hack last unless you want a girl to get pregnant from a viviparous alien or human. Ovolarviparous does not require a girl to be menstruating, and is much, much easier to get a pregnancy with compared to a viviparous mate.
There are twelve traits you can discover, and once you figure out which trait a girl has, recruiting is easy and will usually only cost 75k to coerce, however it can cost up to 125k. Here is what each trait requires to get coercion to 100%:
Poor Treasury - Bribe, Photo, Fraud
Rich Treasury - Photo, Gossip, Fraud
Lazy & Introvert Academic - Bribe, Photo, Kidnapping, Academic Favour
Studious Academic - Photo, Grade Threaten, Gossip
Innocent WETA - Bribe, Fraud, Work
Close to Family WETA - Bribe, Grade Threaten, Kidnapping
Quality/Price WETA - Bribe, Fraud, Kidnapping
Fashionista WETA - Bribe, Photo, Work
Puritan OB/GYN - Photo, Gossip, Fraud
Indecent OB/GYN - Bribe, Fraud, Work
All Default Results - Bribe, Photo, Gossip, Fraud, Kidnapping
Once this is done, you've gone through the "difficult" part and can go from here, however there is one more trick that I can share that will probably be changed so you can't do this anymore later in development. When choosing between contract type A, B and C, you can just constantly offer the same one until eventually the girl accepts. For me, this is always contract type A, since I have no idea what the game means by "trick" and what the percentage or multiplier affect, and therefore see no merit in picking B or C instead.
So, all in all if you get lucky a girl can cost as little as 125k or as much as 325k, but usually you will find them costing you 175k to 225k. Or if you save scum, a girl can only cost you 75k since you don't need to have done any investigation in order to start coercion. As far as I can tell, traits only affect how you recruit them and do not affect anything outside of that, unless you want to roleplay a little bit, like me who only recruits attractive or lewd girls.