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I don't think this is a stupid fear at all! Everyone reacts to death differently, and I think wanting to accomplish certain things before death is valid. Some people create "bucket lists" of things they want to do before they die. They try to accomplish as many things on this list as they can, and they can add to it if they want to.

I can't say that you'll accomplish every single thing on your list, because it's hard to tell. But you can start by creating goals for yourself, whether they're small, medium, or large goals. Accomplishing the smaller goals will give you some of the confidence you need to work on the bigger goals, and also gives you something to achieve while you work towards those larger goals (for example if you need to save money or go to a new location to accomplish a goal).

Besides making a list of things you want to accomplish, keep track of things you HAVE accomplished. I bet you'll have a lot on that list, and that list will grow as you go through life and gain more experiences! It's something to remind you that everything isn't a waste, and that you've accomplished more than you think.