I'm planning to buy a new camera (Nikon D5600) and it turns out that they have two variants. One of the variants come with the usual 18-55mm lens and a 70-300mm telephoto lens. The build as per me, as I've seen it, was perfectly fine to me. No issues with that. I want to know from all the photographers out there regarding it's quality and focussing speed.
P.S. : I'm a high school student who has taken up a more-than-amateur interest in photography and is self-taught. I can't afford to buy costly lenses now, so suggest me if the 70-300mm lens is worth the price for a beginner or not.