Wallseye is right on many thing,
GFE/PSE both includes Kissing, how much thong they gonna put depends on how many factors, its YMMV(your mileage may vary) as if your mouth is clean, how the girl dig you, how good you kiss... They also both include BBJ(blowjob without condoms) and MSOG/MPOS , i think means Multiple Shot on Goals(you can cum multiple times during your hour), MPOS(you can cum in the position you want)... Those are like the basics of the usual good agencies, but of course you need to be respectfull and clean.
PSE more often than not refers to a pornstar experience so more likely Cum in Mouth, Cum on Face(facial) and Greek(Anal sex).
Of course some GFE girls also offers CIM(cum in mouth) but usually anal is more PSE xpected...
Thats the usual meaning, but of couse attitude could also play a part, for exemple if you book a known pornstar, you may expect a pornstar experience, as in sure the whole pornstar package for acronyme, but also a more "agressive" girl, as in you have the impression your having sex in a porno movie, when the GFE acronyme usually refers more as "having sex with a girlfriend"
I hope i cleared things up well for you. Since you are beginning, i tough you may need explanations on acronymes...
As for recomandation...
Yes Kate of Goodgirls is probably the best SP for a first meeting(and somebody i would recomand to anybody who see escorts) She is a sweet girl, really friendly, extremely beautifull, she gives a warm, sensual and passionate bed session, as she make you feel she really make love with you, and she really gives amazing blowjobs.
She may not have the biggest boobs, but they are quite big, all naturals, small nipples, well im a boob lover and i think they are awesome....But she has overall an amazing body. Some may argue im sold out but damn this girl sure knowns how to make you go crazy.
As for other sugestions...
Depends if you like fake boobs or not, you mentioned D cup, but not if natural is mandatory... if enhanced boobs are ok...
Kaila of GG is very pretty, very friendly, excellent service
Brooke of GG, also very pretty, friendly girl, not as "sensual" as Kate or Kaila but still a very nice session with her.
Well thinking about it, i may sound like GG publicity agent, but i got lots of booking with them and 90% where excellents. Lots of there girls got fake breast, but you said you are looking for D cups or above, so ... D cups and bigger are harder to find for naturals... There is Mitsou who is independant, never saw her for a booking, but hanged out with her in a party, she is a cool girl.
But Merb got some good agencies as well, i may not be as familar with there girls as i am with GG, but xxxtase, wildtime, eleganza gave me good services in the past few years.