D3300 you will get a lot of noise on anything over 400 ISO.
On that model you aren’t able to set your own Kelvin value for white balance so you’ll always need to fix it in post.
Also the quality of your image has to do a lot with what lens you are using. What are you using?
Prime Lens Usage
You can use Prime Lenses:
A prime lens is a fixed focal length lens that does not allow you to zoom in or out. In short, the determined focal length of the lens is the distance between the point of convergence in your lens to the sensor or film in your camera. Prime lenses allow a handful of benefits compared to their zoom counterparts.
Prime lenses are significantly sharper than zoom lenses. That is due to the fact that they don’t have extra glass inside that moves in order to zoom. As a result, you get better quality photographs due to less diffraction, which increases with higher number of lens elements inside as in the case of zoom lenses
A larger aperture value (larger fraction) = a wider opening = more light coming in = shallower depth of field (much less in focus) and a faster relative Shutter Speed.
The Solution to your Question is a Prime Lens of 50mm or 85mm Aperture F1/1.8 or F1/1.4.