That's great that she is interested. What we did with both of our children after they showed an interest in potty training was set up a potty schedule. We would put them on the toilet when they woke up in the morning, before & after lunch, after nap, before bath, before bedtime. Sometimes they would go and sometimes they would not, but it really cut down on the amount of diapers we went through. It took a few months before either of them told us that they had to go.
Pull ups did not work at all for us. The kids just used them as they did their diaper and the pull ups were so much more expensive....as if diapers are not expensive enough. lol Both of my kids started potty training a few months before their second birthdays. My son took about 10 months before he decided to tell us all of the time when he had to go and would go all day without a diaper. My daughter caught on in about 4 months and has been dry during the day ever since. My son wore a diaper at night for just about a year. It has been about six months since my daughter stopped wearing one during the day, but she is still wearing one at night.
I don't know if taking your daughter every 20 minutes to the toilet is too much. We both work out of the home so there was no way we could do that and I would think the child might lose interest or just become annoyed and not do it because they want to show their independence. On the flip side, if it does work maybe it won't take almost a year like it did with my children. Give it a try, if she starts showing some resistance, maybe extend the time in between asking. Our schedule worked great because that seemed to be the natural point of when you would use the restroom anyway. They would see mom and dad go at this time and we would just say this is what we do. We always try and sometimes you have to go and sometimes you don't. Then of course as they had more body control, we did not have to do the schedule anymore. They recognized the bodily signs and had a bit of a lead time to get to the toilet.
