Content Warning: Social Judgement, Death

First of all, I'm unsure how to flair this. I feel as though I need support *and* advice, but support most of all.

I've always been told that I should focus on only the people in my life that matter: My friends, my loved ones, and the people who write my paycheck.  
That's all well and good, in fact, I very much *want* that. I wish I could convince my mind to only concern myself with how my loved ones think of me, and not just any random stranger.

...But I don't even know where to begin? When I try not to think about what others think, I just feel like I'm being willfully ignorant. Anyone else get that?  
Feeling anxious because I'm not anxious.  
It's because I'm just so worried that I'm missing something, and that in the future, I'm gonna get blindsided by something that should've been obvious, had I been on high-alert like usual.

I've also been constantly thinking of death, and my place in the world. I want to make a positive change. I want to, in the end, be at best, liked, and at least, looked at neutrally.  
But I'm scared. I fear being hated, if I made a mistake that ended up making everyone hate me and view all my intentions with the worst. If they will remember my name with scorn, and I'll be dead and unable to defend myself.

Is this a fear anyone else has had? Also, is there any solution to this?  
I know I need to manage my anxiety, but I feel like I'm just "deluding myself" when I do it, and that my anxious thoughts are "reality."

Even now, I feel a tightness in my throat that hurts whenever I swallow just thinking about this.  
Thank you so much for reading, it's been a relief being able to type out my thoughts. Although on the other hand, I'm also afraid unloading them online where just anyone can see them, oh well.