Manual photography is one of the main and best parts about DSLR photography. It is quite useful in many cases--whether you are doing night photography, portraits, closeups, etc. I have prepared a quick, easy guide for y'all who would like to learn about manual photography.
1) Shutter speed
Shutter speed is the speed at which the camera shutter is exposed to light. An example of a shutter speed value is "1/100", which means that the shutter is open for 1/100 of a second. The faster the speed, the less light the shutter will be exposed too. Furthermore, the comparison between the shutter speeds of "1/50" and "1/3200" is that 1/50 will create a lighter image and 1/3200 will produce a very dark one. For blog photographers, you would most likely want a lighter photo, so your shutter speed would be relatively low. To capture quicker actions with no blur, you would want a faster shutter speed. In order to still integrate light into that image, you would want to adjust the aperture,
Aperture is controlled by a hole in the camera lens. On your camera, you should see a value starting with the letter "f". That number is the aperture. The higher the aperture, the less light you are allowing your camera to take in. Similarly, if you would like to capture a lighter image, a conventional aperture is f5.6, but you could decrease the value if desired.
3) Manual focus
This step is complete optional. I have horrible eyesight, so I don't always use this function, unless I am filming or if I would like the camera to focus on something else entirely. To turn manual focus on, there should be a small switch on the side of your lens, usually with the letters, "M" and "A" (manual and automatic). This function is very optimal for filming.
4) ISO sensitivity
ISO sensitivity is a value which can be usually altered in your camera's settings. This number is the level of light that is exposed to your camera. The higher the number, the more light is exposed.
Go out there and do photography! Take risks, experiment, and play around with the settings of your camera. Practicing is the only way you will ever learn how to manually photograph.