There are many things that seem to worry people when they are out alone, one are the sounds of the woodland or forest at night and day.
I would suggest that you go out and gradually increase the amount of time that you spend alone, you will get used to the noises, slowly but surely.
As Toddy suggested start closer to home if you wish and then work farther abroad (into the areas surrounding where you live).
My first night out I hardly ever sleep really soundly, but after that you get a feel for the area you have chosen and this allows you to to relax that little bit more as you are more familiar with the sounds you will encounter.
This holds for both night and day trips, the more familiar with the area you are using, the more comfortable you will be. You will find that even the older hands at this will always find something at first that they find a little strange about an area that they have never travelled before.
It is not something to worry about as we all go through it at some stage or another
and it is not something that any of us laugh about since we know where you are coming from
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All the best with your trips, Leon