Raggie,
I think you have very little to worry about. I suspect that you have yourself, your life, and your situation together and in order much, much, more than the majority of "clients" that this assistant type individual normaly helps.
You can run computers and work on them, you can converse with all of us on CPF and the Internet, you can take pictures and post them for us to see. And these are only simple examples of the things you're capable of. You may not think it's a big deal, but there are literaly MILLIONS of "normal" people you might mistakenly think are "better" than you are out there that wouldn't have the first clue of how to do those things.
Assuming this assistant is a nice normal person you can get along with, use them to your advantage. Since you've gotten this far in life without one, you know you don't really need this assistant. However, use this asistant to relax a bit, since you know you have some backup. Keep doing the normal good job at running your life that you have been, but rest a little easier and try to be less anxious about forgetting something, or having problems you can't handle, because you know you have the assistant to help you on the rare chance you need them.
So simply put, relax because you know you don't really need this assistant, and relax more because you know you've got the assistant on the rare chance you need them.
Most people have to be rich and famous before they can get an assistant to help them run their day-to-day lives. Try to think of it that way.