Pilot G2 pens. Not expensive and write well, use them at work and not be too upset if s customer walks off with one.

SAS shoes. Made in Texas, hella comfortable. You can’t buy them online, you have to go to a shoe store and get properly fitted. They also fit the saying about not skimping on things that come between you and the ground.

No experience with Ryanair specifically, but airlines do oversell their flights. That said, if you check in as soon as you are able, right at 24 hours before, you should be ok. The people who run into trouble are the ones who wait to check in until they get to the airport.