Immigrationboards.com

Hello everyone.
I am working on my EEA family permit application. I am very concerned since I can't afford a proper lawyer and I really don't know what kind of supporting evidence is best to provide.
Does anyone here have some tips or pieces of advice to share?

I have a couple of questions as well:
[1] Does having an EEA certificate of registration help? I don't have one but I could get it although it looks quite complicated.
[2] As a full-time student, how important is it to provide financial documents?

Thanks for your help!

Forgot to mention, I am Italian and my future husband is from Ecuador(getting married in August the week before applying for his eea family permit).
We have been together since 2012 so have a lot of evidence like pictures and chats I could take screenshots of.
Is that usually enough?