2007 caliber sxt auto

I have replaced the starter on the car. The replacement to long do to the fact that I had to take the intake manifold of so i could get to a wire i split and fix it. Once i put everything back together, nothing happened. I would love some guidance on what to do next. Thank you.

Have a check engine light on and been looking online for answer on how to fix these issues. Also can I do it myself or do I need to take it to the dealer & I have done a lot of work on my caliber at home with some knowledge of repair work.