Styling of Widget (Image and Title)

Hi, I want to use the widget to show 5 random posts. The plugin does what it has to, thanks for this ?? I want to fine-tune the layout a bit and need some help:

1) to have the “featured image” next to the “post title” I had to use this setting: Displaying Post > The featured image of the post > 1) “Align the image to: Left” and 2) “Display this section before the title of the post: enabled”. The second part ensure, the title was not shown before the image.
However, if the post title is small and has no line-break, the distance to the next image/post is much smaller (e.g. 2px) vs the others (e.g. 10px). Question 1) how can this be standardized?

2) I used “https://www.ads-software.com/plugins/recent-posts-widget-extended/” before and would like to use the same format for the “featured image”. Question 3) How can I add some styling for the image, to add a small frame? Some space and the a thin gray line?

3) Also from the other plugin, they added a small thin gray line between the posts. How can I have a small thin gray line between the posts?

4) Last and easiest one, how can I make the post title change to be in bold?

Thanks a lot for the support!