Blockquote in capital letters… how to change the styling to small letters

I find it unpleasant seeing my blockquotes in capital letters and in a certain colour too. I tried all I could in the appearance – customise section by adding my own custom code so as to change the blockquote of my post to the desired but, the changes are not effectual.
Can anyone please proffer a lasting solution?

What he is describing is precisely what I have been working with your support to fix to no avail. First, I don’t use Gutenberg and run only Classic Editor but have tried both to try and fix this disaster. The tagdiv default settings in your Core are set to Roboto font, 18px height, and centered. Additionally, your Core code forces light blue — same color as hyperlinks which is a nightmare — and ALL CAPS. I have set the Theme Defaults to Veranda, 12pt and no go. You sent me Custom CSS which in ANY other WordPress theme would supercede code and that does not work on the Editor side.

Here is the screenshot of the default editor

https://prnt.sc/wf0iwh

Custom CSS provided by you to change this issue

http://prnt.sc/wf0k3k

And even the default settings changed.

https://prnt.sc/wf0kv9

On the front end the CSS somewhat works; however, the height (px) of the letters remains at 20px even though I specify 11px. The bigger issue is the nightmare ALL CAPS light blue on the editing side.