My touch pad wont light up. I did all the things to make it work that I read online yesterday, so I am unsure what to do now

Is this about an external touch pad for the Mac or for an internal one?

For the external magic trackpad follow this instructions:

Turn the device off and on

Magic Mouse has a switch on the bottom of the device, and Magic Keyboard and Magic Trackpad have a switch on the back edge of the device. Slide the switch to turn off the device (no green is visible), then slide the switch back to turn on the device (green becomes visible).

Earlier Apple Wireless Keyboard and Magic Trackpad models have a power button on the right side of the device. Hold the button until the green LED on the top of the device turns off, then press the button again until you see the green LED to turn the device on.

Make sure Bluetooth is turned on

Using your Mac notebook's built-in trackpad or a USB mouse, choose Apple menu  > System Preferences, then click Bluetooth. Make sure that Bluetooth is turned on.

If the Bluetooth icon doesn't appear, or if the menu bar status continues to indicate that Bluetooth is off, restart your computer and then try to turn Bluetooth on again.

Connect the Lightning cable

Connect your wireless accessory to your Mac with the Lightning to USB Cable or USB-C to Lightning Cable, wait 1 minute, then disconnect the cable. This pairs the accessory with your Mac and charges the built-in battery. To check your accessory's charge level, click the Control Center icon  in the menu bar, then click Bluetooth.

Earlier models don’t use a Lightning cable for charging, but have batteries that you replace. Learn how to pair those devices with your Mac.

Check for wireless interference

If your accessory won't stay connected wirelessly, there might be interference with other wireless devices. Learn how to resolve Wi-Fi and Bluetooth issues caused by wireless interference.

For the internal trackpad follow this instructions

• If there is an “Ignore accidental trackpad input” option in Trackpad settings and it’s turned on, using two fingers on the trackpad doesn’t move the pointer.
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• On some Mac notebook computers, you can use two fingers on the trackpad to scroll in windows that have scroll bars. If your Mac has this feature, you can’t use two or more fingers to move the pointer.

If the trackpad is still not working, your Mac may be showing a low battery alert that you can’t see. Connect your Mac to an electrical outlet or connect an external keyboard to see the alert.

If you still have difficulty, you may have a problem with your hardware. Contact Apple or an Apple Authorised Service Provider for service. Repairs performed by untrained individuals or using non-genuine Apple parts may affect the safety and functionality of the device.