Hi and welcome,
You need to use your meter to test out your foods. By testing immediately before your first bite and 2 hours later you will discover what that meal has done to your levels. Keep a food diary including basic portion sizes and record your levels alongside. Patterns will emerge enabling you to trace and eliminate certain foods, or at the very least reduce the portions. If, for example, you have 4 new potatoes (not a good idea, but just an example) and you don't like what your levels have done, you can try again with 3, then 2, then eliminate them completely.
The before and 2 hour test is important initially and later on you can try testing after an hour, or after 3 hours. Most people also test first thing in the morning (FBG), but quite honestly there are so many outside factors that come in play with this that I take very little notice of what my fasting levels are. You seem to be experiencing this already. Have a read about Dawn Phenomenon or liver dump. The search box will reveal thousands of threads about this. You can also test at bedtime, too. It really is up to you, but the before and after meals are the necessary tests.
As for a lancet. I find the Accu-Chek Fastclix the very best. It contains a drum of 6 lancets that you don't see at all, just press it down on your finger and click. When the drum is finished, just throw it in the household rubbish.