Hi K.,
I worked with toddlers (older toddlers, 20-30 months) specifically for 2.5 years in a daycare setting and was a nanny for quite a few families when their kids were toddlers. Both the ability to communicate AND the interest in using the toilet are important.
I have a guide for you here which might help you in assessing your child's readiness to use the potty independently. This is from
) Stays dry for 2-3 hours at a time or wakes up from a nap with a dry diaper.
2) Shows increased awareness of bodily functions- she may move to a quiet or private spot to have a bowel movement, for instance.
3) Tells you she has peed or pooped in her diaper.
4) Dislikes staying in wet or soiled diapers.
5) Shows interest in wanting to sit on a toilet or potty chair or expresses a desire to wear underwear.
6) Is able to follow two step instructions.
7) Is able to pull pants up and down easily.
(- See more at: http://www.regardingbaby.org/2011/11/28/toilet-learning-m...)
I think your inclination that you are pushing too early is probably a correct one. If she has no interest, that's a hurdle you will not overcome easily. If she has interest, but no way to communicate, then her efforts will be frustrated by repeated accidents.
I will also say this, rather strongly-- when you are ready to really potty train, and see that she is ready too, get her OUT of anything like disposable diapers or pull-ups. Children who can really feel the pee getting their clothes wet are the ones who will often learn the process the most quickly. I found that for most of the kids I worked with, kids who moved from diapers to underpants with no pull-ups during the day nearly always were able to become independent with using the toilet more quickly than those who stayed in pull-ups. They become a bit of a crutch for many parents and kids. With my own son, when we needed something "extra" when he first started toileting (like using the toilet in public, which is scary for some kids--they have a loud flush, and the automatic flusher can scare them-- you can drape toilet paper over the sensor to stop that, by the way), I always put him back in a diaper. This way, there was no confusion.
This is one area that requires a lot of parental patience. If I were in your situation, I would wait a bit until you have some semblance of expressive communication from her. What I would also do is speak to both the early intervention therapist about alternate communication methods (signing, or using picture cards to convey her needs, so that she might be able to hand you a card which tells YOU that she needs to go) and your pediatrician. If you aren't squeamish about it, bring her into the bathroom with you and narrate everything you do, kind of like a tutorial. "I feel like I have to go potty. The first thing I do is push down my pants and underwear. NOW I sit down....etc."
Lastly, cut yourself some slack. With a new baby, write yourself a new script. "I will do what I need to do, and in our own time. My daughter will learn what she needs to learn, when she's ready, in her own time." My guess is that if you ease up on yourself and don't guilt yourself too much about this, you'll feel better. For what it's worth, even with all of the kids I have helped to use the toilet, I waited until my son was nearly 3 years 4 months old to help him learn to use the toilet. He simply wasn't interested before that time. Once we put him in underpants, it took him about a week and only a handful of accidents to be successfully using the toilet. I never asked him *if* he needed to go, just kept telling him "it's time to use the potty" every 1.5 hours or so. Being patient paid off for us. No m&m's, no rewards-- the best reward was staying dry! :)