Tegan,
My tip is have a potty that she can play with etc ASAP..
I learnt this from my sister whom had a boy that the summer after his second birthday she bought a potty & started trying to teach him to sit on it etc...
But he was petrified of this thing he was now expected to sit on... So it made him scared & afraid of it & he began hiding whenever he went.
With Maddison, as soon as she could sit on her own, I would get her up in the morning, make her toast & sit her on a blanket, sitting on her potty infront of the TV, she loved it & would kick her legs singing to HI5, she would pooh & wee quite often as that was the time she'd generally do a pooh & so we'd cheer & clap together...
By the time she was 20 months she was fully trained (almost by herself) day & night... As it wasn't something we just one day introduced, she had played with the potty & come to enjoy sitting on it!
She would even at around 14 months take her nappy off sit on toilet & yell out "Yay!" I knew she'd been.... So clapped & really made a big thing of it... It was not so great when she was 18 months & would carry the potty to the toilet to tip out herself & just spill it everywhere!

But I think having it around prior to training really helped & we will get one soon to have around so Indah can play with it etc. maddy would wear hers (clean) as a hat etc & put her dolls & teddies on...

Sorry rambled on there, but maybe if you grab one now & just have it where she can play with it, so it's not introduced one day & then start training, let her get used to it!!!

Ok Good luck with TT & #2!!!