Stupid thing but I had to inject my wife for months and I hated the whole thing. Where, what angle, what pressure to apply and then when I was 'in' taking care

Stupid thing but I had to inject my wife for months and I hated the whole thing. Where, what angle, what pressure to apply and then when I was 'in' taking care not to move or cause more pain and blood. Shaking or slight tremor = pain. Depending on the size and action of the 'pump' I was always putting her through some new pain everyday. And then I nicked myself several times, even with the modern home-injection kits for noobz... Mronths of this, I don't feel better poking anyone. I should have got trained. So, yeah, if we find a way to do without nurses, or teach properly the thing to everyone, OK...