How you access hotspots on Android devices will depend on which phone you have and what version of Android you're running.
You can generally open the pull-down shade and turn on your mobile hotspot from there or find it buried in settings.
Where exactly and what it's called will differ depending on your phone's manufacturer. Samsung phones bury it in Connections > Mobile Hotspot and Tethering > Mobile Hotspot, while LG only asks you to tap Settings > Tethering.
You can probably find it quicker on your specific device by searching for "hotspot" or "tether."
Once the hotspot has been enabled, there should be a network name and password displayed in the settings screen that can be used to connect another device to the internet.