I'd start with headset spacers to raise the stem, and high rise stem, Something like this, Check the size though.

https://www.amazon.com/FOMTOR-Bicycl...%2C197&sr=1-16

Or an adjustable stem one like berner suggested.

You can also buy high rise handlebars, But I think that may be challenging to install unless you have some bike repair experience. My friend has a hybrid bike that came with a flat handle bar that he replaced with tall one (about 6") and is very happy with the results.

I tried to make my comfort bike more like a road bike by lowering the handle bars, Mine are easy to lower as this bike has a quill type stem and slid the seat back on the rails for more reach. I didn't like the results so put it back to the way it was.