Website Help (Main Page, Remove Something at the bottom, and adding extension on website)

[ashamedxyz]

Hello everyone! 

This is my first time setting a website up so please bare with me, I have several questions.

1. How to I add "SMS Waitlist" like this shop (example in picture) does, I know it's the kylavio extension, but how do I add it onto the webpage itself?

2. Why you visit my website, it goes to page error right away as my homepage, and I want my homepage, to be linked with the shop, and not having customers seeing error when they first visit.

3. When you click on "shop" tab, I really want the customer to see the title of the item, how can I make that visible, instead of just them clicking on it and see the title of the item afterwards.

4. Small question, but I am looking to remove the "by fkxmedia" at the bottom.

Thank you so much.

website : https://ashamed.xyz/

password : help