When you use your fingers,they will get tingly and weak generally. It's hard to pass out that way.
There are supposedly 2 carotid arteries that bring blood to the brain. 1 is on each side of the neck,behind the jugular vein that brings blood back to the heart. Like settone1994 said,blocking the jugulars causes pain in the head from pressure buildup since blood goes into the head but can't come out,hence increasing pressure and causes agonizing pain. Because the carotids are under the jugulars(1 of each carotid and jugular on each side of the neck),you have to press hard enough to compress both the artery and vein. You can't really just compress the 2 arteries.
You have to have something to pull against your neck so that once you pass out,you stay unconscious.Whether this be from gravity(full suspension hanging or partial suspension hanging),or the night night method like avoid_slow_death mentioned.
So yes,this can kill you. This is how partial suspension hanging works. It's aimed at blocking the blood flow rather than your windpipe so that it's faster(like 20 seconds or less to pass out I'd compressed enough).
Do you have any family? Have you tried getting help at all? Is there anything in life you want to live for?
If you need anyone to talk with,I'm here. If you're feeling suicidal,please take your time. It's been a whole year and a half since your last attempt. Was this because you decided you may want to live? Is this why you didn't try again? Or was it other reasons? Did you feel happy you didn't succeed or not? Just please be sure you're of sound mind if you do end up choosing to end your life. Be absolutely sure it's what you want.
Again,I'm here if you need to talk. We all are. Don't hesitate to chat with us :)