Tips for Phase 4

Hey everyone. I recently hit phase 4 and I can clearly see that it is extremely more challenging than the previous phases. I have built a decent aluminium factory that produces aluminium sheets and aluminium casings. I also finished a rocket fuel power plant that produces 54000GW. Now I am not entirely sure what I want to do next because it's getting overwhelming. I bouncing between starting a radio control unit factory, but I haven't automated crystal oscillators or high speed connectors yet.

Honestly, I am a little demotivated to continue.

Any tips or advice would be great Thanks.