+1The short answer is that you probably won't die. The longer answer is that if something bad happens, there's a really good chance you will die.
It's really your call.
However I will say that when I had about 50 dives, I felt the same way you did, A terrifying encounter with a bunch of line tangled @90' and 1/2 tank of air changed my mind, and I don't dive solo anymore.
There are people that do, and in the end it depends on your risk tolerance and responsibility for others. There are a lot of things I did when I was 18 and single that I wouldn't even consider married at 52.
Among other issues are 'presence of mind" and 'situational awareness'.
As a relatively new diver, you don't know what you don't know.
When problems develop the diver's approach may make a difference regarding whether the problem is solved relatively quickly, or becomes fatal. A diver who can keep his/her head, remain calm, and think their way out of a predicament can escape problems that might ultimately kill a diver who panics.
The issue is that being comfortable underwater to the point that you respond calmly to emergencies is not generally a trait new divers possess. You are not born with it. In fact, the emergency response instincts that work well for you on land are the same ones that get you in trouble underwater. The correct responses to underwater emergencies are somewhat counter-intuitive.
Responding calmly to life threatening circumstances underwater is a learned trait. Most divers become comfortable underwater incrementally, generally by diving frequently.
So do whatever you want to do...but I recommend you get some additional dives under your belt and do some research on the subject before you simply jump in the water solo as a new diver.
Best,
Doc