Customize wordpress plug in

General information for the website: Restaurant reservation system Kind of development: Customization of existing website Num. of web pages/modules: one or two Description of every page/module: We have a restaurant reservation plug in that we're using on our site (https://en-ca.wordpress.org/plugins/restaurant-reservations/) and I'd like to make some tweaks to it. For example, I want to change the confirmation so that it goes to a new unique page. And, I want to the way the plug in deals with confirmation messages. I'm sure we'll come across additional things as we move forward. Description of requirements/features: See the notes in the description Update the reservation form so the notes/comments field is visible by default (currently need to click a button to make it visible and I find this confusing and silly) Mask the phone number field so that the phone number is captured in a format that is easily legible (+1-878-555-1212) and that it gets sent via email in the same format. Currently we would receive the number is 18785551212. Add social media widgets if possible so people can make reservations directly from facebook, instagram and twitter. Extra notes: