Am I in the wrong or is this justified?

My trans sister, and I were super close when we were kids. She moved out, transitioned to a woman, and ended up living in her partner's late grandparents' house. Then they broke up, she got into polyamory while in that relationship, and eventually split with all those partners too. Now she's living with some random person she met on Reddit and thinks she's really got it all together.
Meanwhile, I'm still at home with my parents, I'm 20, and I have a boyfriend. We're trying to save up to move out, but the job market is rough, and I've been searching for a job for about five months with no luck. Anyway, my sister keeps messaging me like she knows what's best for me, even though she's not really part of my life anymore. I told her about my caffeine addiction and how I want to quit because I hate spending eight bucks a day on it. Instead of being supportive, she sent me this long message about what I should or shouldn't be buying since I'm unemployed. It really annoys me because she's done this before, telling me to go back to school, which isn't even feasible for me right now. She acts like she has everything figured out, but it's clear she doesn't. I just need some advice -am I overreacting? Is it wrong for me to feel upset that she thinks she knows what's best for me?
Am I in the wrong or is this justified?
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