How To Add Search Bar To Header Area

I’ve seen a few similar type of posts, but nothing really direct. How do I add a search bar in my header area? Is there an easy way? I do like the search function, but I don’t like the category area. Something with the possibility of an autofill feature. I know many other coupon code websites have this function, and I would so love to have this 🙂
Any tips, advice, suggestions for a non .php coder? I have the clipper theme, and it’s available in it.
Thank y’all so much! FYI, I think is pretty much the best supportive forum I’ve seen in anything.