How should I add photos?

[Kadzi]

Hey! I'm a new autograph-collector having only recently had an interest in it,
so far, the only celebrities I've tried have their own photos that they send so I only need to put in a LOR and obviously the envelope,

however, some I want to do people have said to put your own photos in?
How do I go about this?

It sounds obvious but is a normal printed version fine, laminated. I'm not sure?!

Thanks for your help!