Hey Maximus,
It sounds like your biggest fear is the fear of death. There are a couple of realizations or truths that can help you with that. Just realize that first of all, death is something every human being experiences so you're in good company.
Every human who ever existed has or will die. Everyone responding to you on this topic will eventually pass away. So we are all in the same boat. We will all be as dead as doornails.
There are 2 possibilities. There is no life after this one or there is an afterlife. Let's start with possibility #1. If this life is it, death is pretty much like sleep. Reality is you've spent billions of years not existing before you were born. Do you have one single unpleasant memory from the time before you were born? Any misery or suffering during the time you didn't exist?
See, you have already experienced death and you didn't even realize it. In a sense we experience something like death whenever we have dreamless sleep.
The second possibility is there is a life after this one. If near-death experiences are actually visits to a spiritual realm that we go to after death, all NDE accounts I have heard are pleasant and a better life is waiting for us on the other side of this one. If NDEs are simply brain activity before dieing, then our last moments would be pleasant ones before falling asleep.
Either way you look at it, suffering ends at death so there's Nothing to be afraid of. Finally, as far as fear of injury, don't live in fear but learn some basic self-defense and also the mental and social skills for avoiding or de-escalating situations that could turn violent (95% of potentially violent situations can be avoided or verbally de-escalated)