Im a 15 year old female and love clitoral stimulation, however when i orgasn it doesnt last very long and i am still wanting more however hard i try i cannot extend my orgasm. Can you gove me any tips on how to multiple orgasm??? Please...

(I used to be lying down in my bed when I masturbate, and always whith my left hand ) at the begining, I had the same problem : It' s too short and we haven' t the time for to have more pleasure.But I have found the solution : be cool, no be impatient and no stress, take your time. When you have finish ( the orgasm disappear ) wait and alittle of minutes then the pleasure come back so you can beging again. This is a good technic for me .
Do you understand me ? Sorry I' m french...good luck.