Salam Alaykum,
Labayk Ya Hussain! As a small act of khidmah, I’ve prepared a free 34-page Arbaeen Walk Master Guide (PDF) for zawars walking Najaf to Karbala; written especially for first-timers from the US, Canada, UK, India, and Pakistan.
Download: https://drive.google.com/file/d/1es0Yg42-fFvSoKVZjoJqhaxb2Mco3ri3/view?usp=drivesdk
It covers spiritual preparation, physical training, surviving the extreme heat, packing light, footwear, visas and travel, the pole system and pacing,