Yes, it is not possible to bulk uploading of images for photo gallery. You will need to manually add the images.
To use the Photo gallery in your homepage or in any innerpage
First add some photo from Photo Gallery -> Add New
To display gallery in homepage, Go to Appearance » Theme Options » Sections » Section 6
Use this shortcode to display photo gallery: [photogallery filter=”true” show=”6″]
Set filter=”false” to remove filter from gallery
To use gallery in your page, add this shordcode in page content: [photogallery filter=”true” show=”6″]
Please check the documentation