Hmmmm....you should be all right for the present, but if you have aged that much so soon I suspect that you are resting a lot. Dont use that!!!! It ages you damn quickly. Its a far better tactic to Magic Door to town and get refreshed there.
As you don't have a manual, it is going to be hard for you to find out all the commands, shortcuts and some of the less obvious features in the game.
If you like, I can e-mail you a walkthrough that also explains some of the basics.
And don't worry about YOUR age either - I am a child of the 50's
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Regards
Mouse