How can I optimize my site https://begold.eu What can I add, change? Where can I get traffic from Europe? Is SEO optimization good? Do you like my site?)

Analyse your website via Google Analytics tool

First analyse your site fully with help of some tool.

I couldn't connect to your site. Is it working??

Check your website is working right now. Anyway optimize your site via Google Analytics.

I couldn't reach your site. Please refer few SEO tools freely available in Google, that will definitely help you.