POTTY TRAINING.....UGHH!!!! LOL?

i could really use some tips on potty training my 2 year old!!!! its like she is so interested in it but she wont use it lol. she likes to flush the "big potty" and put toilet paper in it, i went out and bought the big girl panties that she loves to wear, she recently started taking her diaper off randomly by herself even if theres a poo in there (thats alot of fun) lol but no matter what she wont pee in her big girl potty. ill take the diaper off, put the big girl panties on and dont you know she will not pee, she will hold herself till i put a pamper on her then do her thing in the pamper. this is my first and im new to alot of these things and so far this has been the biggest challenge (besides getting rid of the nuk which hasnt happened yet).... i really need help lol