You can try these simple tips 1st:
1.Switch your auto focus mode to AF-C for moving subject.
2. Check your posture a when holding your camera. Must be stable. 1 hand hold is strictly no no. Your set up shouldnt feel heavy if you hold it properly.
3. Half-press your shutter release button, then click it down gently. (like firing a rifle). Never punch down the button - a common mistake by newbie.
4. If it too dark, try using the flash.
If these fail, post a sample picture so that we can trouble shoot. You have good gears, which give u a gd start. just need some basic understanding to get going. No fear. Take it 1 step at a time.