Selma Theme- Images Issue

Hello, I’ve been working tirelessly on my new website but I’m having some difficulties especially with images. The page that I’m working on is: https://lailaiflorist.com/wedding/

I have a couple of issues:
– The page right now is in full page width size. How do I get rid of the word “wedding on the top of the page? It creates a weird overlap with the feature image.
– How can I make the image bigger? Because they are not the same size, I tried putting them in “thumbnail size” but I would like for them to be larger.

Thank you so much for your help!