Turn on Hotspot on the device you want to share internet from
Open Wi-Fi settings on the other device
Find the hotspot name in the available networks list
Select the hotspot name
Enter the hotspot password
Tap Connect or Join
Wait for the connection to complete
Check that the internet is working
If it does not connect, turn Wi-Fi off and on again
If needed, restart both devices
If needed, confirm the hotspot password is correct