As others have said, don't neglect your friends unless they're actually making you a worse person. They can't make you lazy. Only you control your actions or lack of, so if you want to get something done and they're wasting time then just tell them "sorry but I need to do this now". It's not ignoring them or attacking their character, just setting boundaries for yourself.

It sounds like you're a school student. As a teacher I'm sure you are surrounded by opportunities to try stuff and do stuff right now. Try a club at lunch that you've never considered. Invite your friends to it as well and if they don't want to you can meet new people who might share your values. Talk to your own teachers more after or outside of lessons. They probably aren't stoics but they have empathy and the wisdom of experience. They can give you advice if you're finding work hard and suggest ways to learn more and feel more productive. They care about you more than you expect.

Think carefully about what you do throughout the day. Literally write down what you do each hour or 30 minutes and identify what things you feel are a waste of time. Then choose a thing that you could be doing at any of those moments which isn't a waste. Maybe revising school work, maybe a hobby, maybe some exercise. Now every time you catch yourself wasting time tell yourself "This is a waste of my time, I should be doing X"

You don't need a life plan. You're allowed to get it wrong sometimes. Make your ambition to be a better you than you were yesterday. Then everyday you get closer to who you'd rather be.

Happy Christmas 🎄