Can't find info for lidocaine that im looking for.

Ive been lurking here for some time now and finally decided to give lidocanie a try. Honestly I've been searching all morning on where to apply lidocanie cream. I haven't found any specific answers, or maybe im searching the wrong things. Im just worried im going to apply to the wrong spots and lose my erection all together. The most consistent answer for amount I've found is "pea sized" droplet from tube.