Orvibo Light switches

Hello everyone,

I am new to smartthings, so sorry if this question has been asked.

I wish to buy these for my house
My question is, does Orvibo work with Smartthings?

My second question is:
I see everyone talking about device handlers and changing code??? Is the a beginners guide to do this???

Sorry if the questions sound stupid but i am new to this and would like to understand what and how to do things…