Why is my website loading so slow and how can I improve it?

[DapperGent]

I'm working on improving my site speed and have been using page speed insights and Gtmetrix to analyze my site. I'm aware of the following:

1) I have render blocking CSS

2) I have unused Java script

3) I need to lazy load images

4) I need to compress images

Can anyone help with these issues? I'm comfortable modifying the code myself just not sure what code to use and where to place it. Thanks in advance. 

Website: Https://dappergentlemencollection.com 

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[Zworthkey · Accepted solution]

Hii @DapperGent 
Here is some important thing which can help you to optimize your store speed.
1)Optimize your CSS code https://cssminifier.com/

2) optimize your js code with the help of this link:https://www.toptal.com/developers/javascript-minifier/
The same process is in js code.

3) Compress your image with the help of these tools: 

JPEG Optimizer. ...

Kraken. ...

Tiny PNG. ...

JPEG.io. ...

ImageRecycle. ...

Compressor.io. ...

Ezgif.
I think it will help you to optimize your store speed.
Thank You.