Website speed is too slow and Broken Images

I am a beginner and I’ve created a website which is responding too slow and I don’t know how to Improve the website speed. I’ve tried multiple options but still the problem is not fixed especially in mobile it takes too much time to respond.
2. Second Problem is when I open the website, pictures on the home page shows broken and doesn’t open.

Can any one from support please help me. Thanks,

Hey there

I need to check your website, please provide url, without it I cant say anything


Thanks for your response, here is the URL

Its not our theme, please contact theme author for help