www.wysiwygwebbuilder.com

Hi Croatia... of cause there are members in this forum that can help you. Some for free and some maybe want some coffee
But have you checked any of the templates, just download and study how it's done, this for example:
https://www.wysiwygwebbuilder.com/suppo ... uthor.html

If it is hard... contact me from my contact form on my webpage, the link is down in the signature of this post

Well responsive webdesign has many tricks and tactics. Using layout grid is the key. If you need help you have our contact below also. Responsive webdesign is our thing

Maybe this information will also be helpful?
https://wysiwygwebbuilder.com/layout_modes.html

For further details about how to share a project file, please see this FAQ:
https://www.wysiwygwebbuilder.com/forum ... 10&t=82134