Hi and Welcome

We all love dogs here and that's why we use Positive Reinforcement Training only. Tia sound's delightful. Please post some pics, we adore seeing pics
First thing is to get a clicker and learn how to use that.
http://www.dogtrickacademy.com/members/forums/threads/getting-started-with-a-clicker-for-newbies.5023/
They really do make training so much easier than just using praise and treats.
It only takes a few minutes to 'load' the clicker and once you've done that, then you can start to use it for lay down. Make sure as well as treating you also verbally praise her.
As already suggested Kikopups channel is awesome and a lot of very good vids there which will help you train Tia.
I also think that even though she's not a puppy any more, you may find some useful tips on the puppy training thread. Or try the General Obedience Thread, loads of good advice there.
For tricks, the trick thread is awesome.
Browse through this site and you'll find heaps of tips on training all manner of tricks.
Plus, you can always start a new thread with any questions you may have, everyone here will be only too willing to help you.
