These are basic steps/a quick overview of things I've picked up from serveral sources online over the years, enjoy
And remember preventing LMR is not 100% because all girls are different but it should help you gauge were you are at, If anyone has anymore please add.
Calabration is the key to this, for every step you take if you feel any resistance take a step or a few steps back and give her space, but don't do freeze outs stay with her, kiss her and make her comfortable enough so you can move forward but if she says no then stop, no means no.
Don't have full on makeouts in public, instead try to get her to quiet place were she can feel comfortable.
Step 1.
Take control
Makeout (pull her hair at the back)
Kiss her on the neck
Hold her in close.
Step 2.
Cup her boobs
Pull her hips into yours
Cup her pussy
Step 3.
Put her hand on your bad boy
Put your hand down her pants and finger her softly by rubbing her clit
Start to remove each others clothing (pull trousers down etc)
Step 4
Start to finger her (using the comehere technique)
Get a blow job/hand job/lick her out and get her off
(This is where you want to get her so horney she can't say no)
Step 5
Move in for sex and fuck the shit out of her
Next up, how long should you do this for.
I got this from a pornstar I seen interviewed online and she says sex should last at least 20-25 minutes for a quicky and an hour plus for nights in or whatever
So in my experience for the 20-25 minute mark 15 minutes of foreplay and about 10 minutes of penetration
For the longer periods penetration should be about 18 minutes if you want to leave an impression, thou you could cut it up into 15 minutes of foreplay 15 minutes of penetration, cuddle a little and go again as many times as you want or can manage, and try to get her off during foreplay aswell. But mix and match this doesn't have to be fallowed dogmaticly.
If you feel your going to cum
Slow down your thrusts
limit the depth of penatration
Stop fully inside her and grind a little
As a last resort pull out for a few seconds till you calm down
Ways to last longer (mix up you thrusts)
3 shallow 1 deep
5 shallow 1 deep
9 shallow 1 deep
The Nintendo reset button (press the area hehind your sack and your ass if you feel you possibly pushing yourself over the brink)
You can also count out the strokes in your head, for timing
400 strokes is about 6 minutes
1200 strokes is about 18 minutes
2400 strokes is about 36 minutes (if you can manage this you shouldn't be reading this but giving me advice!)
Techniques
Comehere (use your middle finger) insert about an inch and a half in/about three inches down from her belly button. Feel for a spongy area on the top wall, now move your finger as if you're telling someone to come here and move your hand back and forth a little. You get her off this way and LMR should not be an issue!
Stick a pillow under the small of her back as she is lying in missionary, throw her legs up over your shoulders and pump her, this will feel really deep to her and you will feel alot bigger
for more information check this link too
no4-building-your-sexual-confidence-vt6 ... highlight=
This is all I can think of so lastly I'd like to say, don't rush yourself, you have to feel comfortable too, hope these helped a little.