Redesign a Wordpress Website, improve m-responsiveness and load times

Our company developed AI technology to choose the best photos on your mobile device and present them in beautiful thoughtful layouts and page groups that tell a story.
This is our website: https://photobook.ai/

1) We need an overall re-design of the look & feel of the website, to be more closely related to our logo in terms of colors and fonts.

2) While the website is responsive, some elements aren’t properly displayed.
We’d need not only to have these elements fixed but also general usability to be improved for mobile devices.

3) It’s getting a low score on the PageSpeed Insights test, specifying many reasons why this is happening: https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fphotobook.ai%2F&tab=desktop

4) Add New Content: We also need add a few pages (no more than 10) featuring some recent customers and the apps we created for them

5) We will create a new wp installation for you to develop fresh on and then cut the dns across when released.

6) We are not looking for a total re-brand, rather to clean up some design elements that may seem "powerpoint'ish" at the moment.