I wouldn't bother. This is a fixed-port housing, which means you'll be limited to the 18-55mm kit lens. This is quite narrow, by underwater photography standards, and it gets further narrowed down by the flat glass in front of it, plus the flat glass adds some fairly nasty pincushion distortion. You can alleviate that to a degree with a wet dome, but it's still 27mm FF-equivalent on the wide end - a GoPro is much wider, allowing you to get that much closer to a given subject while fitting them in the frame. With a mirrorless (i.e. EF-M or RF-S mount) camera, you could use a lens that is compatible with wet wide lenses, but the EF-S mount does not have any of those.
Also, your camera is an SLR, which means that to engage its phase-detection autofocus array, you must use the optical viewfinder. If you use live view, the pellicle mirror used for autofocus swings out of the way, and the camera uses contrast-detect for focusing, which is much slower and less reliable. However, this housing does not give you access to viewfinder, so you have to either use live view, or shoot blindly.
As a new diver, your best course of action is to stick to the GoPro. Underwater photography is, if nothing else, a very expensive undertaking - a typical underwater photography rig costs well into five figures USD; the housing is just a small part of it - so it's best to have some experience before committing to this path.
