2009 Yaris accident, need to replace passenger door question

[Toastybear]

Hi, it's my first time posting on the forum.

My 2009 yaris is a 3 door hatchback.

I just got into an accident recently.

My passenger door is scratched and dented in, but otherwise everything else is fine.

I don't have collision or comprehensive, only basic insurance. So I'll have to pay for a passenger side door myself.

I'm wondering if I pick up a replacement yaris door, at the junkyard does it have to be 2009 also? Can a 2008 yaris door work or any other year?

Secondly, will I need to find a door from another 3 door hatchback or would a 5 door passenger side door be the same size and work also?

Lastly, is it a difficult job to replace the door myself, or should I get it professionally done? What do you recommend?

I've searched google and the other forums and can't seem to find a solid answer.

Thank you all in advance for your help.