Hello everyone!

Im finalizing my first Europe adventure and made a quick road-map.
Could you scan it and tell me what I might be forgetting?

Flights booked
Interrail pass ready
Basic travel insurance
Hostel reservations for Rome & Paris
Europe Trip Planner tool -> tourspilot.com (lets you drag-&-drop cities + auto calculates train times)
SIM card vs eSIM?

Thanks a ton!
Alex