After you pass through the Royal-Family Shortcut during your escape from the castle, you wash ashore in a cave on Suthorn Beach.

Explore Suthorn Beach

You'll wake up in a cave. Go to the right and approach the shimmering rock. Press ZR to learn the Rock echo. Go to the right and go south to exit the cave.

You can press - to open the Adventure Log and Map. Press L or R to switch between them. You can see your destination to the east. The destination is also shown in the minimap in the corner of the screen when you're not looking at the map or adventure log or pause screen.

Go south and a monster will appear. Pick up a rock, or create a rock echo and pick it up, then hold ZL to target the monster and throw the rock at it. Then go up to the shimmering monster and press ZR to learn the Zol echo.

Tri will explain that if you create an echo of a monster, it will obey you, and you can target enemies with ZL to make your monster echo attack it. Be aware that the Zol echo is fairly weak, so it is likely to get defeated by enemies that you send it to attack, so you might have to make a lot of them.

Go south and there are two Zols that you can optionally defeat.

Go east, where there are two more Zols. Go north from there to see a treasure chest on a ledge. Create a table echo next to the rock beneath the ledge. Jump on the table, then jump onto the rock. Make a table on the south end of the rock, jump onto it, then make a wooden box north of your table, and jump on it. From there, you can jump onto the ledge and open the treasure chest. You'll get 20 rupees.

Go south, and if there is a Zol beneath the ledge, you can drop a boulder on it. Then go south to fall off of the ledge.

Go east and you find some spiky monsters. You can create a rock and throw it at them to defeat them easily. Then go up to the shimmering monster and press ZR to learn the Sea Urchin echo.

Go east past where the Sea Urchins were, and there is another Zol. Go east and you will be prompted to use the right control stick to look around. There are rupees underwater that you can reach by swimming above them and holding A to go underwater. Then hold B to go back to the surface of the water.

You can also see a Piece of Heart to the left of this area of water. To get it, go into the water, then jump out of the water onto the island east of the Piece of Heart. Create a bed echo in the water, then a wooden box echo to the left of the bed. Jump onto the box, then make another box to the left of that, and a third box to the left of that. Then jump up onto the ledge with the Piece of Heart.

Go back to the island in the middle, then jump up onto the higher part of the island. Create a bed echo that is sitting partly on the island, and jump onto it. Then create a bed echo on the northern half of the bed that you're on. Jump onto it, then go north to the island there. Create two more beds to cross to the north side.

Throw rocks at the Sea Urchins to get rid of them, and go through the north door. You'll enter Beach Cave.

Beach Cave

Go down the ladder, then go down the second ladder. You can try to defeat the Keese by throwing a rock at it. Then approach the glowing Keese and press ZR to learn the Keese echo.

Go to the right and jump up the steps and go up the ladder. You'll see a Piece of Heart down below. To get it, create a bed beneath the torch in the wall, then jump onto the bed and create a second bed on the right side of the first. Then jump onto the second bed and create a table on the right side of it. You can jump onto that table to reach the ledge above. Then go to the right side of the ledge and create a boulder echo to break the boxes below. Destroy the boulder by holding ZR until your echoes disappear. Create and destroy two more boulders to break the remaining boxes. Then go to the right to fall (or press downward on the left stick to climb down) to where the Piece of Heart is.

Climb back up the rock wall, and go to the upper ledge on the right. Go to the right from there, create a rock, and throw it at the Zols. Then go to the right and go up the ladder. You'll come out at Suthorn Prairie.

Suthorn Prairie

You can now use amiibo. Press + to go to the system screen, and choose amiibo, then tap an amiibo figure to receive helpful items. You can only use amiibo three times a day.

Go east, and tilt the right control stick to the right to see a treasure chest on a ledge. Go south to the trees, and there is a short ledge that you can jump up. Create a bed north of yourself, then create a table on the north end of the bed, and jump on the table to reach the ledge. Open the chest to get 50 rupees.

Go south, then east, to reach Suthorn Village.