Click in the BIT in your homepage editor to directly feature 1 or 2 posts on your homepage.
Use the + or - sign to change between one and two posts. When you add more than two posts it becomes a carousel. Also, if you change from latest posts to selected posts it becomes a carousel. Refer here to read more about post carousels.
When you choose latest posts in a category, you will be directed to choose a category in the right sidebar. Click the category you want and then you will see the posts in the viewer.
Your featured posts can be viewed a few ways on your homepage. Text over image will display the post with the title, synopses, date, etc. over the picture. Text beside image will display the hero image with the title to the right of it. Click the arrows to swap this orientation to the left.
Make sure you click Save to keep the features you put on your homepage. If you want to delete a specific feature, click the trash can icon .