When Zander came to my home, he was 3 months old, I would say he was potty trained trustworthy by 7 months, meaning he hasn't had an accident since that age, he is now going to be 2. Jazzie came home when she was 4 months, she learned faster than Zander, when she'd go 1 or 2 I would give her a cheerio, plus taught her to ring the bell. She has been trustworthy, no accidents since she was 7 months, she is 1 yr. old. I have read to stay vigilant until they are at least 2 years. Just to give you some idea of what to expect.
It's a great feeling when your home is not their toilet
...Good luck.