Hi,
Have a search in the search box. There must be 50 threads at least on the Libre. You will find all the information you need on those. Many people on this forum use them.
You must remember that the Libre measures interstitial fluid, whereas our meters read blood. The interstitial fluid runs 10 to 15 minutes behind blood so you need to test, then wait, then scan. You also need to take account of the meter and Libre accuracy tolerances. If you do some comparison tests, some at higher levels and some at lower ones, keep a record and average them. This should give you an estimate of how much higher or lower your Libre is reading and you can make mental adjustments.