Worried about what my 22 month old daughter can do?!?

for a 22 month old baby shes doing great,they can only say some words at that stage,perservere with the potty training,im having trouble with my 3 year old son,wont go to toilet with pants on,but when he has a nappy on he wants to use it,just go with the flow,stay relaxed and she will come on great.