How can I extract files from a disk image backup (.image file)?

I backed up my old device using dd and am trying to access its contents. The following has been attempted:

usr@pop-os:~/Backups$ sudo mkdir /mnt/
mount -o loop .image /mnt/
mount: /mnt/: failed to setup loop device for /home/usr/Backups/.image.

The file was created by using the following command:

sudo dd if=/dev/sda of=.image status=progress

usr@pop-os:~/Backups$ fdisk -l .image
Disk .image: 29.12 GiB, 31268536320 bytes, 61071360 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x38a56bdb

Device                              Boot  Start      End  Sectors  Size Id Type
.image1 *     10240   962559   952320  465M 83 Linux
.image2      962560 61071326 60108767 28.7G 83 Linux
usr@pop-os:~/Backups$

How can I explore the contents of a .image file?