Some questions if anybody could help me. Either one or all of them would be appreciated

Recreational meth user.. Basically because my gf likes it but I can take it or leave it. Decided because she's doing and and I find it kinda boring I'd try Iv (against my own life plan ) since if there was one drug that wasnt gonna addict me. It was meth. It's pretty good Iv. But I still find many other drugs better. 4mmc, ketamine and psychedelics/nitrous

1 - how to register a vein better? I'm very lean and muscular with a lot of veins popping out and I still cant hit them?

1. - how much water for meth? I been putting like 100mg into 0.3. So basically a ml for 300mg. Using heat and stirring to dissolve it.

2a - is this too little water? I've had the needle clog up with what looks like blood once or twice.

1. what to do when your mix has blood in it and you can't see the if Its aspirating?

2. -how to steady hands better?

3. Any general tips to make it easier (I've learned the key ring trick and it's awesome) ?

I'm 32, have tried every drug bar heroin. Have been an active drug addict 3-4 times. Benzos and cocaine. Mainly cocaine. Very bad.

What I've learned is that addiction (for me at least) isn't and never has been a "drug addiction" but an addiction to escaping my life. Mental health problems, was in a bad place, mother issues, gf issues, self esteem issues. They are all resolved now and I'm in the best place I ever have been in life. And I'm more experiance and educated about drugs than 99% of (non iv lol) the population. This will not be a problem for me. Smoking meth is worse Imo for me anyway. Much more compulsive. Hard not to smoke More than 1 bowl but 1 shot satisfys me (as long as it was strong enough.

General safety tips welcome - "don't do it bro" comments will be ignored