Honestly, there’s only like 3 Chasms you need to worry about.
Hyrule Castle and Death Mountain, natch, but also the one in Minshi Woods, as it’s the only way into Korok Forest.
However, in the case of the Minshi Woods Chasm, be ready to fight Gloom Spawn. One hangs out between the Minshi and Korok Groves, and there’s a second Gloom Spawn that you have to defeat if you want an easy way to get the Master Sword.
The relevance will not immediately become clear, but you would also do well to poke around the Zonai Ruins between the Spring Of Courage and the road to Lake Floria. Recommend having Treasure Chests in your Compendium as well as Sensor+ unlocked.