Much more choice with injectables and as said the orals are very toxic so not good for your liver.

I'm sure there are plenty of online sites etc to help with where. I was once told arse is the easiest place. Imagine your cheek a ball and quarter it (horizontal & vertical line through the middle), use the outer top quarter to jab. Once the pin is in, draw back a bit to see if you've hit a vein and if no blood goes back into the ringe pump away. Too close in towards the middle and you have the siatic (sp) nerve to potentially hit so outer half only!

Its been a long time since I touch it but I always got my doris to do it for me. Allowed me to relax and not worry about it whilst contorted into funny positions. Get your gym buddy to jab you.