Wouldn't focus on squirting but rather getting them to flow copiously, that's one indicator that you are f-ing right. "Squirting" is mostly braggadocio and porn BS, it happens, with a few regularly, but most not at all, not that regularly, and it is just as likely to embarrass them and make them cool down as anything IME if they aren't used to it.
1. Never be a "pure thruster," try to get them to masturbate for you, watch whether they grind on the ****, stroke it or press back to the spots in the vag. Try to carefully estimate the amount of pressure they are using, increasing and decreasing, fast and slow, be observant. Watch what they do to themselves and then do that with your applicable body parts. Simple. Don't TELL them you are doing this to learn their buttons, tell them it makes you hot. Don't jump them in the middle of their masturbation, watch the whole thing very carefully acting as if you are beyond turned on to conceal the careful attention.
2. Start juicing them up beforehand, hours in advance. Drop little innuendos, not graphic at all to start, their imagination will do the rest. Then get gradually more suggestive and graphic. Rarely just grab them into bed and f them, that's how ruts start and they get bored. Give them some food, wine, get them talking about their feelings, sensations. Watch 9 1/2 Weeks. Never just "f them now" when they say that or "take me," play with it, repeat, confirm, tease. "I've been thinking about your all morning," becomes significantly later in the day or night "I've been thinking about your hot, wet juicy pxssy all day long, I've GOT to have that Pxssy." But ramp up, and wait for feedback before escalating. The best sex is escalated when it's THEIR idea to escalate or they think it is anyway.
3. TALK. ASK THEM WHAT THEY WANT. "It's OK to tell me ANYTHING you want, it TURNS ME ON to hear you tell me what you want." Not before, but DURING foreplay... eh sometimes before. Dirty talk is key to juicing them up. Repeat it back to them, "you want me to...? is that what you want? you don't sound like you want it that much, how much do you REALLY want that?" Tailor your noise to their response, some like to hear a man grunt with pleasure, but maybe not at the start, some like the whole time. Gauge their response to the noises you make and remember that.
If they start off yelling and panting, unless you REALLY juiced them up prior, they are usually faking, it takes about a minute IME to get even the horniest, wettest ones "forgetting themselves" and making real sounds honestly. If I get that fake BS right off the bat, I will slow WAY down, disengage near entirely and start over from scratch. DON't REWARD bad habits like faking, it will reduce attraction in the long run. Most of their faking is because they want to get it over or aren't really into it, you don't want that or ever to reinforce it.
4. In the act, nondescript cues such as "is that it? is that hitting it?" Ride high in missionary, pull ankles up in air and over their head if flexible, and get the clt, g and deeper in at the same time. Wait to switch not just because you think it's time, but they or you are about to come, then and only then switch. Don't just do things right when they ask, repeat, confirm, tease.
5. Don't talk about sex directly either before or after in a "did you like that?" "wow that was great" way. OF COURSE it was great, that goes without saying if she is laying back on the bed sweating all flushed and panting with her legs spread smiling. Keep SOME mystery in it, and most analysis OUT, even though your are doing it with her hundreds or thousands of times. Same principle applies to shtting and peeing with the door open. Don't.
Enough for now, that's a start. As you can see, most of this is mental, nothing to do with d size or raw "technique" or positions, the brain is of course the most sensitive, powerful sex organ in the body. Treat it as such. Your goal of mastery is to make women you are dating start coming in their pants from just kissing them.