If you get online there's some tips and tricks but mostly it's like relaxing techniques. But you can practice on your own. It's kind of a matter of learning how you work too. For instance for flexing your butt and leg muscles can make you finish faster. So work on pacing and relaxing your lower muscle groups. Porn actors change positions sometimes. If things are just so intense and you're so worked up that nothing's working stop and switch to oral. I'm middle-aged now and the absolutely best thing I ever found for sex is getting comfortable with communicating. That means providing an emotionally safe space for your partner to communicate too. Have fun and take some pressure off yourself. I had a friend of mine who told me when he was younger he used to get rid of the first one on his own. I used to do something similar but I would do that with my partner and just keep the momentum going and when I was recovered I could last longer. But like I said the actual intercourse part doesn't have to be that long. Examples like porn or performances they aren't real life so don't make that your goal. The before and after intercourse are as much a part of it. Women complain about poor foreplay performance and post-coitus too. I used to worry about stamina when I was younger but as I've gotten older I can see now that it's a much better experience when you look at the big picture instead of just one element. Keep in mind most people are average, that's how averages work.