Website deployment & backend coding with Api's

I am a real estate agent in Florida & I developed a website with ClaudeAi as well as a CRM to go with it. I have a domain name already purchased & webhosting on Hostinger. I need help taking the website live & making sure everything works & also connecting to my local MLS feed (https://www.spacecoastmls.com/home). The MLS feed will provide an api feed. That is where all the real estate listings will come from that is pulled to my website. Then I just need the CRM connected to the backend of the website to collect & store all the users/leads information. It is basically a database that I can see the users/leads information.