Our beloved body has defense systems.
Including Survival Instinct.
This is probably the most powerful feeling we can feel.
It allows us to survive even in the worst situations.
The problem is that this is a very big difficulty when we want CTB.
So what really is CTB?
This is a complete denial of our nature and our existence.
We must oppose ourselves.
It's damn hard.
People solve this problem in different ways.
Desperation for various reasons, for example extreme physical pain.
Use of stimulants, medicines, etc.
Getting used to CTB.
Unfortunately, even this may not be enough.
It all depends on your current situation and possibilities.
I don't know if there is universal advice.
CTB is a very intimate matter, so each person must approach it individually.
For example, I also struggle with myself.
If it weren't for SI, I wouldn't be in this world in 2022. Unfortunately, I lost this battle, but I intend to win the war. In some sense.
Analyze your situation and create a detailed plan for your method.
This should calm your mind a bit because you will know that you are ready at any time.
Consider the pros and cons of your decision and try to convince yourself.
I do this and it helps me a bit.
Think that something much better awaits you in the afterlife.
Sometimes hope is helpful.
I would really like to give you some very good and specific advice that will help you a lot, but unfortunately I am not able to.
I have a similar problem as you.
Most of us have a similar problem.
Whatever you do, good luck.
It may be useful.