From what I can tell, you want dating advice that isn't pick-up artist techniques. Going on that assumption, I believe I can help.

Don't be afraid of rejection. You will be rejected a lot. Coming to terms with this is important if you are going to have success with women. You have to willing to go after what you want, without fear of rejection. If you like someone, ask her out. Sure she might say no, but she also might say yes.

Don't pursue someone just because she is hot. Physical beauty is very common. Personality is where it's at. I'm not saying go for someone you aren't physically attracted to. You definitely should. I am saying that there are more important things to consider when choosing a person to date. Can you hold a conversation with her? Is she nice? Is she fun to be around? In general, is there chemistry? These are things you need to pay attention to.

Confidence is important. However, it cannot be the false confidence that pick-up artists use. It needs to be genuine confidence, gained from personal success and being comfortable with who you are. To get that, you need to be the best version of yourself that you can. Work out. Dress nice. Try to eat healthy. Practice good personal hygiene. Take up hobbies besides video games. Learn skills. Doing these things will make you a happier person in general, and you will be more confident as a result.

When on an actual date, the most important thing is to have fun. People like to treat a date as some sort of high-stakes job interview. Don't be nervous. If you are out on a date, that means you guys like each other. You both thought it would be worthwhile to go out and spend time together. Enjoy it! Few things are as fun as going on a date with someone you have genuine chemistry with. If the date isn't fun, that is usually a pretty good indicator that you aren't compatible.

Here is my advice if/when you move to "serious relationship" territory. This is stuff that both you and your spouse will need to do for it to work. You being 18, this should be YEARS down the road, but I feel like it needs to be covered regardless. If you are in a serious relationship, you need to operate as a unit, as opposed to two individuals. A serious relationship is by definition an agreement between two people to help each other get past life's hurdles. It is literally the two of you against the world. With this in mind, you need to be a team player. If something is good for the team, do it. If your spouse is at work, you have the day off, and there is business to be done (running errands, paying bills, etc.), you need to do it. If you have an argument, don't treat it like "me vs. you". Treat it like "Us vs. the problem".

I think that is all the important stuff. Hope it helps. If you have any questions, let me know.