Take this with a grain of salt, it's impossible for me to tell what you are and aren't comfortable with, but there is an alternative to using trackpads or mice at all and that's tiling window managers. You drive the OS with your keyboard. Combining this with plugins like Vimium for Chromium based browsers (or Tridactyl for Firefox) you can drive your entire OS and browser with keybindings.

As an aside, the latter also teaches you the bindings for Vim which is a nice boon if you've tried in the past and couldn't make it stick.

But again, this might not fit your use case or your preparedness to invest time and effort. I'm just saying.