Any advice?

Okay, so I think I'm going to have to make an Almighty Johnsons lj com, in the hope that other people will come out of the woodwork and be willing to talk to me about it. However, as I haven't tried to make a com before, I was wondering - does anybody have any useful advice?

Also, I need a better Almighty Johnsons Icon, but this one will do for now. I'll take a ficlet prompt from anybody who can tell me which one of them is the granddad - and no googling!