Formatting issues

please see attached. I can't figure out why the formatting is off. For example, how do I make the titles above the images to be centered? How do I make the buttons below the images centered? How do I center align the text?

Why is the title that says "we focus on technology..." show above the 3 navigation dots? Shouldn't it be below those dots?

How do I make the title fonts darker and bold?

How do I change the buttons?

What size should I make the 3 images so that they all remain aligned properly across the page?