My advice is think of a practical skill you feel comfortable with and learn it well. If it’s useful at any stage of technology, you will have a decent job secure for the rest of your life even if society advances a lot or falls to the stone age.

With that kind of foundation in place, you can then have fun (responsibly) or even afford to build a family with someone. Long term, it is what’s useful, though you might miss out on the dumb risks of youth (which are totally peer/social pressure) and cause you to do dumb crap when hit by middle age anxiety.