Where do I start with the new certificates?

I had just completed the front end certificate when they released all the new material.
What new things from the certificates should I learn? Which of the projects should I do?

thanks for the advice

Anything that has been added to the curriculum which you think you may not fully understand or need more practice with. More projects is always better, so I recommend doing them. You’re doing this for you, so take from FCC what you want.