Help me make good espresso with my temporary set up [poor machine, plus Kingrinder K2] - situation in text

I'm away from my home set up, making do with a basic set up in an apartment I'm staying in.

I have beans, a Kingrinder K2 and a 2 in 1 machine that can either use pods or the pressurised basket that comes with it.

So, here's where I need help - How should I adapt my recipe to suit a pressurised basket and a that pulls with 19/20 bars of pressure?

I'm thinking to down-dose from 18g to 15g, and grind coarser? I can't alter the machine, pressure, temperature or anything else. It's a basic, press a button and go machine.

Help me people. I can't be without espresso🙏