#1
hey how do u make ur chord progressions and how u know which chords will go togeather for the type of music u want to play
how to make stuff like rhcp???basically
#2
You can learn the chords of each key, and then make your own progressions. Start with building the chords of the major scale and then move on to understanding the standards like I - IV - V and ii - V - I.

Then you can analyse RHCP chord progressions and see how they fit in with what you've learnt and use that knowledge as inspiration and guidance to create your own with your RHCP influence shining through.