Start with high-confidence travel writing books, then narrow by subgenre or adjacent topics.
Voyager
Russell Banks
Dear Exile
Hilary Liftin, Kate Montgomery
The Last Place on Earth
Roland Huntford, Paul Theroux
Baghdad Without a Map and Other Misadventures in Arabia
Tony Horwitz
Rounding the Horn
Dallas Murphy
Life on the Mississippi
Rinker Buck
How to Win at Travel
Brian Kelly
A Philosophy of Walking
Frédéric Gros, John Howe