Hey Googlie! Welcome to the fourm!
We're glad to have you here! I think we've all felt that way at one point or another (some of us probably still do!), but there's not necessarily a right or wrong way to collect - just do what you want to do and enjoy the journey! Oh yeah, and be sure to share pics too!
As far as taking pictures of one thing or everything - why not both? You can edit your first post with an "overall picture" and then include separate ones down the road. I personally like to show separate finds cuz I can tell little stories about them if applicable (though I haven't done much of that on this site here yet, but I WILL).
Also, do you have any favorite series? What platforms do you collector for?