Are there any keyboard shortcuts I can use?

Yes! To see them all:

Here's a complete list of keyboard commands for both Mac and PC/Windows!

GENERAL

Increase zoom → Mac: ⌘ + + | PC: Ctrl + +
Decrease zoom → Mac: ⌘ + - | PC: Ctrl + -
Reset zoom → Mac: ⌘ + 0 | PC: Ctrl + 0
Undo a previous change → Mac: ⌘ + Z | PC: Ctrl + Z
Redo a previously undone change → Mac: ⇧ ⌘ + Z | PC: Ctrl + Y (or Ctrl + Shift + Z in some apps)
Save → Mac: ⌘ + S | PC: Ctrl + S
Scroll up and down with the mouse wheel → Mac: Scroll | PC: Scroll
Scroll left and right with the mouse wheel → Mac: ⇧ + Scroll | PC: Shift + Scroll
Increase/decrease zoom → Mac: ⌥ + Scroll (or pinch-to-zoom) | PC: Ctrl + Scroll (or pinch-to-zoom)
Unlock free scaling when dragging an object corner → Mac: ⇧ + Drag | PC: Shift + Drag
Drag the canvas in any direction → Mac: ⌥ + Drag (or use two fingers on a trackpad) | PC: Space + Drag (or use two fingers on a trackpad)

Copy the selected object → Mac: ⌘ + C | PC: Ctrl + C
Paste a previously copied object → Mac: ⌘ + V | PC: Ctrl + V
Delete a selected object → Mac: ⌫ | PC: Delete
Move selected object pixel by pixel in any direction → Mac: Arrow keys | PC: Arrow keys
Move selected object by 10 pixels in any direction → Mac: ⇧ + Arrow keys | PC: Shift + Arrow keys
Send selected object to back (layer) → ⌘ + [ | PC: Ctrl + [
Bring selected object to back (layer) → ⌘ + ] | PC: Ctrl + ]

Pick and add a layer item to the multi-selection → Mac: ⌘ + Click | PC: Ctrl + Click
Multi-select items from the currently selected one up until the clicked item → Mac: ⇧ + Click | PC: Shift + Click