Walk forwards from your landing spot on Savali and you'll encounter Gary, who tells you to find his apprentice at the Interdimensional Archives. Problem is, the town is under attack. Keep moving onwards, clearing the Sandsharks and other enemies in the area, and you'll find a bunch of Nefarious Troopers in the village.
Clear all the enemies and go to the opposite side of the village, where a cutscene will begin and you're introduced to KT-7461 who gives you the hoverboots. Use the speed boost pad to launch yourself over to the mainland part of Savali.
Freeing the monks at the temples
Since Savali is such an open planet, you can tackle things in any order you like. There are three gold bolts, one spybot, and one CraiggerBear to find here, so if you want to make sure you get them before doing anything else, check the linked guides at the top of the page. There are also the Ratchet and Clank Rift Apart lorbs, which we have a dedicated guide for but they are a completely optional objective.
Otherwise, you need to head to the three temples on Savali and free the monks. All three of them are marked on your map by an objective icon, so don't worry about getting lost or spending time hunting them down. Each one is really quite simple; clear all the enemies at each location then interact with the console to free the captured monks.
The Earth Piercer temple at the top of the map should be the first one you head to, simply because it's the most straightforward, there are just a lot of enemies. The Crimson Forest temple is all the way to the east; defeat all of the enemies, including a Nefarious Juggernaut, then after interacting with the terminal you'll need to defend KT-761 against some more waves of enemies. Finally, the Great Rock temple is in the south. You just need to complete an easy hoverboot course, complete another glitch mission, and eliminate the enemies at the end, but don't go too quickly or you'll outrun the platforms beneath your feet.
The Interdimensional Archives
Go back to Monktown and there'll be a series of portals for you to hoverboot thropugh, eventually leading you onto the Interdimensional Archives. Make sure you're stocked up on ammo because this is another big fight against a plethora of Nefarious enemies but when you've defeated them all, turn the boltcrank and head inside the portal for a cutscene. This signals the end of Savali, so you can head back to your ship and go on to Blizar Prime.