Please help: Honeywell hr92 evo

Please please help, new used here!
I have just brought (and I am poor ) Honeywell hr92 evo home, all up and running, but I use SmartThings app.

I know this has been covered before but I do not know anything about code or anything like that.

Can someone tell me very simply how to get my evo home on SmartThings please? Very simply as I cannot follow the other topics. Thanks in advance