Well... being ADC can be a nice experience if you have a nice Support. Now, to get started, you have to know what to build to your ADC champion. One Word, CriticalAndAD xD.
And now.... the support, a tip: ADC Ashe with support... 3 choices:
1.- Lux.
2.- Morgana.
3.- Zyra.

Ok, this 3 champs can catch the enemy and will make you dont fail your ultimate.
How to do this without getting slow in game only typing?
Use Skype, TS or another voice chat service.

You can try this with other ADC Champs!

Another Tip - Follow this Guide and take the Bot lane to the Maximum!

Thanks.
Undefinyx