Hi Alice,
for the answer is to late now,
I hope you ready arrived in Padang Bai.
Good option to travel alone in Bali is:
Perama
Link: http://peramatour.com/
(a lot of locations and prices you can find on this site)
if you want go by taxi use "Blue Bird" with taximeter
or you take a privat driver with car.
The last option is a little bit more expensive, but individually!
Have a great time and sorry for my english, grammar is not my thing
Greet Chris
If you are interested, I have a recommendation for a driver on Lombok,
he stay near Kuta/Lombok...?