You'll soon get old hat about testing and using insulinif you are a type 1. As soon as you can, start carb counting as that will let you dose per what you want to eat, It will make life easier in the long run.
Sometimes when people first start using a meter they put the testing tip to the blood and the blood goes over the top instead of being sucked in at the edge. It could also be it's not on a strong enough setting. If we are dehydrated it will also make it harder to get a blood drop. If your hands are cold it will make it more difficult too.
It helps sometimes if you massage the finger beforehand and afterwards squeeze from the base of the finger towards the needle prick with other fingers.