I will attempt most things within reason but I think the important thing is to realise what you can do and what you need professional help with.
I used to be seriously into computers at one time and was forever having friends and relatives going, "you couldn't have a look at this for me" so now if anyone asks me about a computer fault, I say I don't know. It makes life easier. Not knowing isn't that far from the truth anyway as my own PC is ancient and I haven't really kept up to date with modern developments in PC land. I hate the things now.