Hi erbins.
Welcome.
Went through all this when I first started testing 11 years ago. Then I was shown how to do it properly. The 'pricker' is called a lancet. there are lots of different types but they all work pretty much the same way. You need to first of all make sure it is on the lowest setting possible to allow you to obtain blood. If yours isn't adjustable you need a new one. You mention your finger tips ? I never use the tip of my fingers, it is too painful. I was taught to use the sides of the top end of the fingers only. There are alternative test sites that can be used but you need to discuss this with your GP or DNS as the readings are usually different.
If you still cannot manage this you need to discuss it with the GP.
Hope this helps in some way.
Ken