getting Here Maps and search engine on website

I am very new to website development but I'm trying to get a project running...

I need to have a Map + Search engine on the main page. I am using HERE Maps, and I have manually achieved what I want: a map with the size I want, a text box to write the address to search, and a 'search' button that does the job. However, I'm sure there's a better way to do this, with autocomplete whilst writing the address and so on... (just like Google Maps or HERE maps do on their websites)

I would like to know if anyone can point me in the right direction, so I can just put something ready and available on my website instead of using my code from scratch.

Thanks