First of all, you should urgently update your PhpVms version ... Beta4 is too old to be used, even for test purposes it would only cause headache both to you and people trying to help you. Use latest dev build, which is more stable and bug cleaned also offers more functionality. And you should check for new builds from time to time, or just follow PhpVms Discord's Releases channel
Your first 2 questions require basic html / css styling knowledge, also you need to get used to laravel blade (view) system to edit things. PhpVms Docs and Laravel Docs are good starting locations to read (if you have the basic knowledge).
3rd one needs a little bit more knowledge 'cause you need to define a table for the flights and do a foreach loop for the rows of the table (instead of cards), which will use data from the flights collection. I did not tried to use a table for the flights, it would work of course but a table may broke the pagination logic and your results may look really strange when you reach the limit for automatic pagination. Anyway, not impossible of course but this would be a little bit harder compared to changing texts or headings.
For the last question, I did it some time ago and today converted it to a widget for PhpVms v7. If you wish you can download it from my GitHub repository with other widgets I offer for vms v7. Check the readme file for more details. Technically if you get yourself familiar with laravel blade system and how to edit files, using a widget (adding it to your template) would be easy.
Hope this helps