Give me a hand on my blog

Good day Everybody ! I created few months ago a blog and I need a webdesigner to give me a hand on a few tasks to make it more professional ^^. Mailchimp action: I am currently using Wordpress, with the Divi Theme. I started to use the free version of Mailchimp to create newsletter. I already created a list called “Newsletter” but I need a signup forms in the “embedded forms” section. I managed to create the first part and customize the html code as I wanted for the sign up form. (as per enclosed picture 1). FIRST TASK: The trouble start when someone enters name and email: indeed the process goes well “subscription confirmed blah blah” BUT I need it in French and with the colors and message I want. (I will of course provide the text and design I need). I have no idea how to customize it through the embedded form Webdesign action: Make the blog responsive on any support: smartphones, Ipad, computers… So far the blog is ok on computers and Ipad (could definitely be improved anyway) but it is a real disaster on smart phones!