The faraday cage is a good idea, ham radio, weather radio, batteries with some flash lights. The faraday cage will work for CME too!
I do believe this will happen soon. So if you have a well look into a hand well pump for water.
You need to buy lighters, gas range to cook the food you save. They sale portable gas ranges for camping that can be used in side. Water will stop after a day so store all the water that you can.
Remember there will be no electricity and it may not come back for years so save a lot of candles. The problems with EMP and CME’s is that they will happen at any time.