Is it normal to be this nervous about the first print?

The short answer is yes, you should absolutely run some kind of calibration before your first attempt at a final print, even if the machine seems fine. It prevents huge headaches later. What you're describing is normal setup anxiety, but a quick test print is how you confirm everthing is aligned. You don't need to run every advanced routine right away, but you should definitely run the basic leveling and priming sequence. That confirms the nozzle is printing where it’s supposed to and that the bed level is correct. If you just load filament and print a big model, you might spend hours waiting for failures caused by poor leveling. I’d suggest starting with a simple calibration cube or a single-layer test print. This allows you to see if there’s any oozing or squishing issues without wasting a whole spool of your favorite material. If the print looks blobby or lifted right off the start, you know exactly what needs adjustment—likely the bed offset or z-height. It takes five minutes to run a simple check, which saves you hours of frustration later. Regarding the lid, the fact that it’s not mechanically locked is common on many versions. While it feels a bit unsecured, most users find that if the glass is seated properly in its rails, it won’t budge during the movement of the gantry. It's less about it needing a lock and more about it being part of the overall enclosed system. Check the quick start guide for any specific mounting instructions, but generally, it’s just a piece of the housing. Once you've confirmed the basic parameters are working during a short test print, then feel free to start the bigger projects. Just remember to monitor the print closely during the first few layers; that's the most critical part of the entire process for any new machine.

Agreeing with the calibration advice, I skipped the test print on my first machine and regretted it big time. Wasted half a Saturday on a print that peeled up because the bed was slightly off, and I had no clue where things went wrong. The single-layer test would have shown me that in two minutes. On the lid, mine does the same thing and I honestly got used to it. I just slide it forward til it's seated and it stays put fine, even on longer runs. Good luck tonight, watching those first few layers is weirdly addictive.

One thing nobody's covered yet, check for a firmware update before you print tonight. Mine shipped with an older version and the auto bed leveling was flaky until I flashed the new one. I've put around 300 hours on this thing since and it's been solid otherwise. Also grab a cheap scraper and a bottle of isopropyl if you don't have them, wipe the plate down before every print for the first few weeks.

One thing I'd add, since you said you nudged the frame: give the pulleys on the belts a quick once-over too, becasue shipping vibration has a way of loosening the little screws that clamp them to the motor shafts. A loose pulley feels exactly like a belt problem and will send you down the wrong troubleshooting path for days. I learned that the embarrassing way on my second machine after a cross-country move. Also, hang onto the box and foam for at least a month, in case you ever need to ship it back, and keep the little hex keys that came with it somewhere you'll actually find them again.

For your first real print, use plain PLA if you have it. I tried PETG on day one of my first machine because it came bundled with it, and stringy messes had me convinced the printer was broken. Switched to a cheap PLA spool and everything just worked. If the filament has been sitting around a while, a glue stick on the plate is the trick that saved me from a week of warped corners. Good luck tonight, check on it after the first layer goes down and you'll be fine.