Cannon Clark

Start with 10 minutes on the treadmill at a walking pace to warm up your body. Then do bodyweight exercises like squats and push-ups for another 10 minutes and keeping sets low to avoid strain. Progress by adding a minute or two each week and include stretching at night for recovery.

Low light makes phase detect AF struggle because it needs contrast. Set a single AF point and use the center one & turn off auto area or face detection. Switch to AF-S for static shots and AF-C for moving subjects, and set focus priority so the shutter only fires when focus is confirmed. Open the aperture as wide as your lens allows and enable the AF assist lamp in the menu if your body has one. Big help. When it refuses to lock, use live view and magnify the preview, aim at a bright distant light or star, tweak focus until it looks smallest and crisp, then switch the focus mode to manual to lock it. For stars, leave it there and don't touch the ring. Bump ISO while focusing to brighten the preview, then lower it for the actual exposure if needed. To avoid blur from vibration use the self timer or a short shutter delay and electronic front curtain if available. For star trailing use the rule of 500 divided by focal length as a starting point and adjust after a test frame.

You get what you for but don't expect much for $300