How to Modify Post Title on Homepage

Hi,

Please, I'm using the WP Show Posts plugin on my homepage, but I'll love to increase the posts title font size and also modify the title alignment to "align left".

Here's how it looks on my blog's homepage right now: https://theodorematt.tinytake.com/media/a15bf0

And here's a sample of how I'll like it to be: https://theodorematt.tinytake.com/media/a15bf1

The sample page is also using the wp show posts plugin. But I noticed that his own titles are bigger and are aligned left, that's exactly how I want mine to be please.

I'll also want the size of my featured post to be the same as his.

Please, help me.