have something to do immediately after you get up, the best run of waking up early and feeling good I've ever had was when I'd wake up with an alarm and instantly put on clothes and go for a walk, by the time I made it back, usually not long like 15-30 minutes I wouldn't feel sleepy anymore

my big problem is I'll go to sleep and my alarm will wake me up, but unless I need to wake up, I'll talk myself into just sleeping longer. That makes it tough when I'm not obligated for anything early and I have to motivate myself, but if you can establish something and make it habit it should get a lot easier over time, at least if you're like me