Hi,
If you don’t want to use default homepage slider, you can use any slider plugin
http://www.gracethemesdemo.com/documentation/sports-club/#homepage-slider
To reduce the height of slider section, please use small height of images.
Also please remove the animation effect from the Theme Options -> Basic Settings to display 5 Box Services section automatically on page load.
Please send your website URL so we can check it.
Regards
Grade Themes