How to change font/design for blockquotes PART 2

Item 1: OK so I am still having the problem with the formatting of the block quotes. example page: https://www.gayundah.info/reception-in-brisbane/ Note the red line down the left hand side, rather than the quote " icon at the top of the quote. So far I have this css added in the additional css section, per your previous responses.

/* blockquote quotation mark */
blockquote::before {
    left: 0% !important;
    color: #000000 !important;
    font-size: 40px !important;
    font-family: Arial !important;
		font-weight: bolder;	
}

/* blockquote text */
blockquote {
    font-size: 20px;
    font-family: Georgia;
   	font-weight: normal; 
		color: #000000;
    text-align: left;
}

/* indent blockquote text */
.wp-block-quote p {
    margin-left: 25px;
}

How can I fix this please? Item 2: Is it possible to have an image as the background in the block quotes? If so, how please? Apology I apologise for having to start a part 2, but previous thread was closed for replies. It said I still had posting privileges, but then gave an error re thread closed (I have a screenshot for you if you want it) Cheers and thanks