One of the most expensive things you may do in your life is to buy a top of the range DSLR/Mirrorless Camera. The thing is to work on your composure then outgrow your camera. You can buy attachments for your current camera to help you get those pictures. This will be shown later on.
Most cameras will have a decent attempt at portraits, landscapes or macro. Where some cameras have issues are long zoom lengths and depths of field.
Composure Tips No.1
Rile of thirds (Portrait)
Always try to have a point of interest on one of the thirds. (Eyes)
Before the Crop
After the Crop