Hi S.,
I would try my sitting backwards on the toilet it is steady for them and you can use the paper seat cover. You can also buy those paper seat covers in little packs like at walmart and places like that so if they don't have any you still will, it will be a little more work because you will have to take Pants and all off, but I think that will help them to be able to and take alot of anxiety away from you. Go out and enjoy the world. I have been working with toddler's for over twenty years now and I can tell you a thing or two about this first hand, I have been right behind many little tykes when they succeeded, and the first one would be: Do not force them, let it be their decision. Forcing them just makes the process alot longer. You take them to the store to pick out their own new underwear and then it only takes a couple of times having an accident before they get the hang of it. But their is 7 signs they need to meet before you even start. When they have an accident do not scold or show disappointment, just say uh oh, it was just an accident, you can try again next time. When they do succeed and get it in the potty, internalize their success for them. I know that you want to jump up and down and hoop and holler but contain it, they have little control over alot of things in their life, this needs to be their accomplishment and idea, so to internalize it, when they do it, you say to them (calmy) wow! how does that make you feel? You put your Poop and Pee in the potty, that is yours isn't it? Another thing I do is I have them sit on the potty backwards so that they feel more secure sitting and they see the BM and urine leave their body which is another internal cue for them. The reason why it is called Potty Training is because the parent is trained to ask if they have to go incesently, and that is a drain on their little self esteem, I know that none of us would want to be asked over and over again or lead in there every hour or so, it's humiliating for them, think about it from their perspective, so if you are reminding him/her or taking them in all the time you are training yourself and humiliating them. We do not give these intelligent little people the credit they deserve, their biggest wish it to please you as a parent so why wouldn't they do it on their own when they are ready, instead of being made to. I do not know if you are familiar with Dr. T. Berry Brazelton, but he has a book called,"Toilet training the Brazelton way" and in his book he has the seven signs to watch for readiness in your child that I mentioned and his philosophy is the one I adopted and I can promise you that it has worked for my children and for countless children in my care for years.
Best of luck in whatever you decide.
These are the beautiful years. (Poop and all)
J. P.