You want to do metering initially before and then 2 hours after meals to see how they affect you, and then compare that to what you ate. If the after number is less than 2mmol/l above the start, and below 8.5 mmol/l overall, you're good to eat that again and don't need to keep re-testing for that particular meal choice.
You don't need to do it every day, just good to know what meals are safe, caution/ only occasionally or best avoided completely.
The meter requires a little sharp stab from a pricking device into the side (not the soft sensitive pad!) of the fingertip; you load it, arm it, then fire it off and it makes a little pinhole prick that barely bleeds once you get the depth set right. Its fairly minimal pain and the needle is invisible during this. But yes, it does mean ultimately massaging out a drop of blood from your finger that you then need to hold the strip and meter up to for sampling.
If thats going to be a problem, then consider the option of a libre 2 continual glucose meter - goes on the arm for 2 weeks, no blood, works with your phone and gives continual blood sugars. Its not cheap but they do a discount trial for new users.