My Lo has used the potty a few times, but we haven’t officially gone through the gauntlet yet of having her with pants off all day, making an attempt every hour or when she shows the signs. We would like to get to that this upcoming week (she just got over being sick and teething). I’ve heard rewards work well too or reading them a book while they stay on the potty.
I would wait and try again 3 months after baby is born (if she seems ready). Even if you are successful now, she is likely to regress when baby arrives. With my first we talked about it with her for months before doing it to get her prepared and then went all in (nappy fairy came and took away all the nappies 😂). She got the wee’s in a day and no accidents after that. Poos took about a week as she had developed some sort of fear of going and was just holding them in 😬 She was 2y and 8m (I’d also waited for things to settle with the new baby before we started).
I would give her a little more time. Have you tried introducing her to the potty maybe with clothes on, talking about the potty, reading her a book about the potty. I think I got a book called Bear Uses the Potty