Please follow the steps listed below:
- Go to Appearance > Customize > Typography Settings
- Go to Body Setting
- Select Primary Font Family, Variant Size,
- Select Font Size and Body Line Height
- Select desired Body Color

- Select fonts for different headings

- Go to Appearance> Customize>Typography Setting>Widget Title Settings
- Select Widget Font Family, Variant, Widget Title Font Size and Widget Title Line Height

- Click on Publish Button