In my case I turned Atheist just a monthss before turning 19 (or 20, no sure). It was somewhat difficult indeed. It was a decision that took me a few days to make.
Regarding your questions:
1. I never feared hell. No even when I was a believer. Probably because I thought I was going to heaven. Curiously, I was afraid of this idea of immortality. The idea of living forever in heaven was scary, not comforting. In your case, you were probably deeply indoctrinated so the fear is part of you. I would recommend you to simply ignore those ideas and move on with your life. Or just meditate. And as you made hell part of yourself, erase it from yourself.
2. After becoming an atheist, I went through a phase of filling "holes" and acceptance of the inevitable. For example: the fact that I would never see my parents after they die. It is necessary to fill those "holes" that religion used to fill for you with fake hopes. This is something you have to do yourself. You can seek for advice, etc., but at the end, it is you who has to overcome your existential crises.
3. I fear death a little and the process of dying. I hope my death is fast. If I ever have to face a painful reality I hope to have the strenght to commit suicide. Now, telling you to commit suicide in case of terrible odds may be not be best option (but it is there). Death makes me sad mostly. Because I would like to see the future before doing. Based on the scientific progress it feels like our generation will be one of the lasts ones to die, which also saddens me, deeply. But you just need to accept it. Have you ever seen a cropse crying? Because I havent. Dying is just like falling sleep. Once it happens, you wont notice it. See it that way.
Regarding your questions:
1. I never feared hell. No even when I was a believer. Probably because I thought I was going to heaven. Curiously, I was afraid of this idea of immortality. The idea of living forever in heaven was scary, not comforting. In your case, you were probably deeply indoctrinated so the fear is part of you. I would recommend you to simply ignore those ideas and move on with your life. Or just meditate. And as you made hell part of yourself, erase it from yourself.
2. After becoming an atheist, I went through a phase of filling "holes" and acceptance of the inevitable. For example: the fact that I would never see my parents after they die. It is necessary to fill those "holes" that religion used to fill for you with fake hopes. This is something you have to do yourself. You can seek for advice, etc., but at the end, it is you who has to overcome your existential crises.
3. I fear death a little and the process of dying. I hope my death is fast. If I ever have to face a painful reality I hope to have the strenght to commit suicide. Now, telling you to commit suicide in case of terrible odds may be not be best option (but it is there). Death makes me sad mostly. Because I would like to see the future before doing. Based on the scientific progress it feels like our generation will be one of the lasts ones to die, which also saddens me, deeply. But you just need to accept it. Have you ever seen a cropse crying? Because I havent. Dying is just like falling sleep. Once it happens, you wont notice it. See it that way.