adc champions usually have high base damage, someone like vayne, graves or varus are oftenly used. since lulu is just a support, she have high disables and her passive give her high damage work with attack speed. Try to do a good farm and leave your spells when needed. Lulu adc rarely die in a gank with good turn back abilities. LuLu adc also dose good damage late game. the only method youneed to learn is----slow them and kill em.

basically use your q and keeps attacking, if you are going a turrent dive, then you probably need you e to shield, otherwise just use e for damage, for your w, use it against fed enemies, it works well and try to keep yourself alive