I start working on the website, its not seems so easy, I cant even change the header, before I just click it and then can working on it, now I dont even know how to start, when i tried to use elementor, then it asked me to update to pro, I dont want to do that , thank you !
You can go to Dashboard > Slides > Sliders > there edit your Slider > under that you can find the option to define Height accordingly for the Desktop, Tablet, and Mobile: https://snipboard.io/UHLEMv.jpg