If you plan to make some modifications to the code of the theme, will be better to make them via the child theme. If you make modifications directly to the parent theme, you will lose them when the theme is updated. When you make modifications inside of the child theme instead, you can update the parent theme without losing any change you have made.
To create child theme and transfer all settings from the parent theme to the child theme , please use Child theme configurator .
More information about child themes you can find in WordPress Codex- Child_Themes.
If your changes are not critical and affect only the styles , and you do not have enough settings that come with our theme then you can use the yellow pencil for these purposes . More info about Yellow Pencill
Also you can use our paid service to hire our team and make your website according to your requirements .