I see veins everywhere, where else can I try next time?

I'm new to this, it was rather impulsive, happened at a wrong time, I'm counting 6,7 thin lines on my arm, am I going too fast or too slow? I just know that this ain't cutting it.

I want to go deeper with all the safety precautions with a rational/normal mind intact before and after. I'm hoping to take care all the mess that comes along with it by myself, and although I have a certain time frame in mind, there's no specific plan for the next time.

I don't wanna think any more tonight, it'd just get me more irritable. I'll go sleep it off in a few hours.