I don't have access to a DSLR camera at the moment. But I have some old photos (unedited) from my Canon Rebel T7, after this course here are some of the improvements I believe I could make the next time I shoot: 

 

-Utilize ISO as a last resort, to avoid noisy image/visible damage. 

-Use shutter speed to negate camera shake. 

-Keep a third of the image in mind as shooting landscape. 

-Shoot photos in RAW rather than JPEG for more options during the editing process.