Hello Introvers and welcome to JUB.
Many of us (including me) when we are young, feel like we've wasted valuable time and missed out on experiences. It's understandable to feel that way, but remember that your life is ahead of you. Sexual experience is not a race. What matters is what you do now, and in the future, not what you feel you should have done in the past. You haven't been left behind, you're just finding your own path.
It's understandable that you find mature men more attractive, and this is not unusual. Older men often are more confident and experienced, and can help you to feel safe and secure, and also to feel desirable at a time when you didn't feel that with other guys your age. What you've experienced already has been good experience for you, and is part of growing up, not missing out.
Curiosity is normal - many of us (including me) started out with experiences with women, and then became curious about guys. You're just looking at it from the other way. You might want to explore with a woman to help yourself understand your desires, or just to understand yourself better. That's a valid reason to experiment, as long as you're honest about it.
Eating pussy is not mandatory, and many guys don't feel comfortable with it at first. For me, it took some time to try it and then to enjoy it. It's an important part of pleasure and intimacy for many women, whereas some might feel self conscious about themselves and their smells and secretions. If you find it unpleasant, chances are she'll know, and it won't be a pleasant experience for her as well. Remember that most women don't orgasm from penetration, and need external stimulation of the clitoris to achieve an orgasm. You don't have to do it with your mouth, but remember you have fingers as well. Let her guide you. Foreplay is very important for women, whether you eat pussy or not. Eating pussy is more likely to get you an enthusiastic lover who wants more sex, and she is more likely to give you a blowjob. But you don't have to do it if you don't want to.
Important differences? From a mostly straight leaning bisexual guy who is a bottom with men:
Men tend to be more direct, genital focused, and less focused on foreplay (although this varies).
Women tend to want more buildup, foreplay, and full body attention. Communication is important because female pleasure methods are not as obvious and she's likely to be embarrassed to tell you straight out what she wants. Women seek a more emotional or psychological connection (although this varies and so too do some men). Vaginal penetration seems to be the ultimate goal for us guys, but for women the feeling and pleasure level can vary depending on anatomy and arousal levels. If a woman is aroused she might feel pleasure from the feeling inside her and of the connection, but that's not where her main stimulus areas are.
Should you meet a woman, or a couple? Certainly if it's what you want. With couples it would be important to be clear about hopes and expectations, who might be doing what, and safe sex choices. With couples, women, men or FTM, don't pressure yourself, don't pressure them, and always obtain consent for anything that happens. With women particularly, speaking of consent, as a general rule nothing goes in her ass, unless she has specifically consented to it.
Maybe therapy might be good for you as well. Good luck and feel free to ask anything else that we can help you with.
