how to fix ipad is disabled connect to itunes if you don't have a macbook

To clarify, nice and simple, you have two (2) alternatives.

1) Connect your iPad to a PC (with iTunes installed).

2) Connect your iPad to a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS).

You cannot use a Chromebook or other type of computer. The recovery process only works with a PC or Mac.

https://support.apple.com/en-gb/HT204306

You don’t need a Mac. You can use a PC as long as it is running the latest version of iTunes.

ipad message "iPad is disabled connect to iTunes

how do I unlock it and reset

It won’t work on a Chromebook. It has to be a Mac or a PC that is running the latest version of iTunes.