Changing the article category page

Hello,
I would like to modify the appearance of articles category pages but I do not know how to do it.
Here is one example of how it looks now:

I would like to make the following changes:
– eliminate the article category name which appears over the title of each article
– show a photo of the article under the title
– turn the summary text into italics
– possibly have the first few lines of the article appear below the summary and before the “continua a leggere” button

Can you help?
Credentials attached if needed.
Thank you. Best regards,
Elena