Click the SYS button on the dash above the screen, and you should able to display the fuel status page. That might help you figure out why the engines aren’t starting.
Edit: also, I forgot. I ran into something similar. Try this:
After turning on the battery, turn on the two left and two right pumps. Don’t touch the center pumps. Start the APU, wait for it to run up and become available. Don’t forget to turn on the APU generators which are off by default. Once you do all your other preflight stuff, start pushback and set the engines to start, and turn on the fuel control switches under the throttle. That’s how I did it a couple days ago and it worked.