Give me some tips to impress my aspiring Father-in-law.

1. Try to be authentic self. It will cause you less stress in long run and also provide a chance to the other person to get to know you better.
2. Be respectful. It is always good to understand other person's perspective specially when they are coming from a different generation.
3. Light the conversation over the lighter topics or if required keep yourself up to date with the recent events happening in the world. Bonus points if you also know about the topics of interest for the other party.
4. Relax and try to enjoy the time together. At the end of the day, both of you would like to know each other better. There can always be some judgement in the equation but with openness and mindful transparency, things should evolve constructively.