And to be entirely fair, some machines lids do not sit fully flush, even when they’re level. I’ve taken my machine apart, otherwise I’d show you that my lid is flush in the front and back, but the center has a bow to it, it never affected its use. If you go into the machine with concerns and anxiety, you’re definitely going to find things that cause you concern.
Once you’ve used the machine more and more it’ll be a lot more comfortable to use. There are plenty of people willing to help here, but more importantly, you’re going to want to familiarize yourself with the tutorials available, especially the links under this section:
Many of us had similar concerns, and the years that we’ve had our machines have made us confident in our skills and knowledge, but it did take many of us a decent amount of time to get to where we are, as well as reading up on the plentiful amount of knowledge posted to the forum.