Three things....
This is what I would say to my son, and have also mentioned to him about his girlfriend as well.
1. Be Patient.... It can take time to figure things out and to figure out which way you want to go. I had no idea that I would end up where I am today. So many people start out in college, or in a career path, and then end up in something that has nothing to do with that... or very very loosely related at best. My DH, looking back, would have made some different decisions back then.
2. Again, be patient, even if you know what direction you might want to go, it does take time and effort to get there... Make the right decisions... College isn't for everyone... Certain professions are not for everyone... I don't think that there are that many teens and young adults that really have that focus and that drive... know what they want to do/be... And how to get there. Even for those young people who do have some focus, it takes some real time and effort. It is harder out there to get started out there than ever. Young people must feel a lot of pressure just in, how am I going to have a roof over my head, a decent automobile, etc... Not everybody is born with a silver spoon in their mouth. And, even in cases like mine, where I started out with literally NOTHING... all my kid, and many kids today, see is that standard of living that they are used to... and it is so very easy to become overwhelmed... it can seem so unattainable.
My son is not one who is going the college/professional route. He has worked with coworkers who grew up with nothing, were out on their own at 18, just trying to keep a roof over their head and something in their belly... They meet somebody else, get some cheap nasty trailer/apartment... end up with 1-2 kids, perhaps then divorced... in a mountain of debt, just trying to keep their nose above water. And at my son's young age, they like to 'rag' him because he is going a slightly different route... Taking his time.... Heck, his girlfriend is younger than he is, and just a young teenager, just a kid, as we old-folk like to call them.
He has mentioned some of this, and that is exactly what I told him... "So, are you supposed to just move out, get some old trailer, move in with some girl, have 3 kids, and nothing else in your future??? Are THESE the people you want to care, at all, what they think????".
3. Having said all of the above... never forget that everything you do today means something... Every thing you do should be, in some way, a POSITIVE, when it comes down to your future. Even if you are just an assistant or a janitor or a cashier, or whatever... That should be in a positive way, in some way possibly related to your future... Same thing goes for your online presence... All of this is out there, and does make either a good, or a bad, impression about you and your future.