I´m not saying anything about the subject, but I´m sticking to the helping line here.......

I find out easier teaching a dog to sit and then go on from there.....

first have her in her leash and collar and it may take long it may be quicker, then hold a treat she loooves in front of her, lt her smell it or lick it and then place it above her head and a little behing so she has to look up and back and that makes her sit....... also say "sit" WHILE she´s sitting not any other time so she relates "sit" whith what she´s doing...... you can also try incorporating a hand signal......

for example I hold the treat (which once she learns you can omit) between my index finger and my thumb and hold the rest fingers up as in an "ok" signal.... say "sit" and once performed you give the treat.....

try this a few times during the 10-15 minutes and then try again later that day if possible, if not again the next day...... just a few times until she realizes that sitting means a yummy treat and she´ll do it

you can PM me if needed