Im literally going crazy, gets paranoid. I just want endless quiet without any memories. I know CTB it would solve my problem but im still afraid of this. I dont know why I wonder what will happen later even though I'll be dead anyway. I can't decide on any effective method.
I'm sorry you're in this position. Not knowing what to do is certainly unpleasant. If it's any consolation, there is no set date for anyone to ctb. We all have our own timelines, and we all process our thoughts and feelings about suicide at our own pace. We as humans are unfortunately built for self-preservation, and it can be difficult getting past it.
By the sounds of it, the fact that you feel afraid suggests that there is some small, unseen part of you that wants to live (?). Please correct me if I'm wrong. Anywho, regardless of what you decide, I know it's easier said than done, but please don't feel bad about being afraid of ctb.
I know it's not great to not know what your method will be but keep doing research, ask for input, and you'll eventually land on something. The absolute worst thing you can do is jump right in without sufficient knowledge on how to execute your method properly, which will most likely end in failure and further suffering.
Anywho, I do hope you find peace in whatever you choose. Take care.