How to be at the top of the search list

Hello everyone.
For the first time we have organised a sponsored ads campaign for our new ASIN product (private listing, branded).
So far 1 sale after 5 clicks according to the metrics dashboard.

What are the steps to increase this? Currently I am bidding at the top of the suggested by amazon bid range, my listing appears either at the bottom of the page or in the middle of the 1st page of searches.

I have tried to research key words using AMZ scout pro and then put those words into title, bullet points and description also into the listing itself.

How do I change my campaign to appear at the very top? Do I increase the bidding?

Would “sponsored brands” or “display” kind of ads make a bigger difference?

worried now as this is our first product…

Many thanks!

Aya