My children are much older but I did it differently. I never took a potty anywhere, actually mine didn’t like potties, they preferred a toilet, with a seat at home. I didn’t feel it had to be done in a week or any set time. We talked about it a lot, had stories, etc. and then we switched to pull ups, so we used them as pants, but no problem if they had an accident. The difference was that they felt wet if the pull up was wet. Then when they seemed ready, we switched to normal pants and had very few accidents.
It took maybe less than a month of wearing pull ups but no stress if they weed, no mess, no telling off, no pressure. I always made sure that they went to the toilet regularly, and I knew where to find one if we went out. Also fun foamy soap at home helped!
However, both of mine were very keen to potty train, they wanted to be ‘big girls’! I think that made it easier, I didn’t really need to encourage them, they were very motivated. Both were dry by about two and a half, (not at night) but I would treat each child differently and wait until they want to do it.