Not quite sure what this site is all about but il try it 
Hi Katrina. Welcome 
The site is about just about anything you like to talk about. Get stuck in 
Hello Katrina,
Welcome to our forum.
Tell us a little about yourself.
Hi and welcome from me also.
I’m the grumpy old Scotsman in the crowd.
Ever so slightly more seriously, this a friendly old forum.
Tell us something about you?
Good morning Katrina darlin’ and welcome.
Hi and welcome Katrina. Sending you a Wave. Did ya see what I did there?
Hi Katmac. I think the name of the site gives it away. 
Welcome to the forum.
Hello and welcome.
Hello Katrina a very warm welcome to Over50sForum…
Hello Katrina, enjoy your time on here. As a relative ‘newbie’ myself I intend to do just that!
:-)Hi and welcome , to a warm friendly place …
Hello Katrina welcome…
Welcome Kat and enjoy.
Sweetie x