For this kind of project you need to create some seams before the unwrap, then load a wood image texture that is tileable so that it can repeat without visible seam, in the UV Editor place the UV islands correctly on this image, load the image into an Image Texture node, plug this node into the Principled BSDF node, and to give a bit 3D bumps to your texture, plug a black and white version of your texture into a Bump node that you plug into the NormalNormal socket of the Principled (or ideally, create a b&w displacement map from your wood texture with a software like CrazyBump). Of course the texture is improvable with a bit of glossiness etc...