Add some functionality in a wordpress template

Hello, I need to add the following functions to my wordpress template: Template: https: //[login to view URL] Download the template: (attached to the project) 1. MENU BUTTON: When the user clicks a menu with a list of categories of the site should [login to view URL] similar to this: https: //[login to view URL] 2. Responsive logotipe 3. SEARCH BUTTON: When the user clicks, a search box should appear with the option to choose which searchable dropdown. This is similar to this: [login to view URL] 4. TWO LINK BUTTONS: one button written "top rings" and the other one written "new rings". When the button is selected, it should be underlined, as shown in the image 5. INFINITE SCROLL (WITHOUT PLUGIN) for posts to be displayed when the navigation bar is scrolling. Function similar to this: [login to view URL] The function should work in index, categories and search results ([login to view URL],[login to view URL],[login to view URL],[login to view URL],[login to view URL],[login to view URL]) The function should cause the posts to be displayed quickly. Please read the entire project, as I will not pay any amount other than the one offered by the worker in the project offer