You'll need lots of patience,a puppy doesn't have any control over there bladder until they are around 6 months old.
You are doing the right thing by taking your pup out,stay out there with her until she performs,however long it may take,reward with lots of praise & a high value treat such as cheese,chicken etc......

Maybe link a word such as Be a "clean" Girl whilst she is performing,so she assoicates the two together,personally I never use paper as I think it tends to take puppies longer as you are giving the signal it's ok to go indoors.

When she Toilets Indoors,simply pick her up put her outside,don't say anything to her,Ignore what she has done & clean the area with Biological washing powder to get rid of the smell.

Young pups need to go out every hour,after meal times,playtimes,sleep etc....
You will get there it just takes time & patience.
Good Luck!