Hello,
Sorry for the delay due to the weekends.
Typography of menu links you can change in Theme Options > Typography > Menu.
Styling of the menu can be changed in Theme Options > Menu > Menu styling.
Do not forget to clear cache before checking the result.
if you face problems with these settings, please describe issues in more details with screenshots.
You can use such screenshot maker as Lightshot https://prnt.sc/
Thanks in advance.
Regards