just yeII if you have a query. I'm an IT engineer by training (currently retired through ill health) and also was a semi-professional landscape photographer (sorry I use Canon). There are also plenty of decent food photographers on the site as well as a professional photographer (cars) and whilst I personally don't use Adobe, I used to support it when I ran a school network (600 students etc).
pixels are basically screen size.
Mb are basically physical disk size. Concentrate on the pixel size and the disk size will take care of itself.
Presumably you know DPI ? (printer quality for a crude definition). keep it to 70-72 for internet use. small pixels, Small size and small dpi all go a long way to prevent digital photo theft.
Having just looked up your camera I'm not surprised you are running into problems...
Sensor
Max resolution 8256 x 5504
Other resolutions 5408 x 3600 (DX crop), 6880 x 5504 (5:4), 5504 x 5504 (1:1), 8256 x 4640 (16:9)
Image ratio w:h 1:1, 5:4, 3:2, 16:9
Effective pixels 46 megapixels
Sensor photo detectors 47 megapixels
Sensor size Full frame (35.9 x 23.9 mm)
It is basically a 46 Megapixel camera. It's overkill for here. Even my old Canon EOS 5D Mkiii is overkill for here and it is 10 years old now (20 Megapixel camera)
Does your phone have a camera you can use?
Seriously. even
Morning Glory who takes fantastic photos uses her camera phone.