You can get some nice renders using Sketchup and Keyshot, Keyshot has a bunch of materials you can assign to your Sketchup model and they will emulate the specular maps etc for you.
3D modelling isn't something you can generally learn half-assed as the texturing pipeline is heavily reliant on the quality of your modelling and UV Unwrapping. I use 3DS Max but it has taken me years (on and off) to get to a good standard with it. The modelling to UV Unwrapping stage is the biggest hurdle but you can skip that by using colour ID maps in Sketchup and sending your model through to a renderer like Keyshot.
I can't speak for Blender as I've never used it but a lot of people sing it's praises.
3D modelling isn't something you can generally learn half-assed as the texturing pipeline is heavily reliant on the quality of your modelling and UV Unwrapping. I use 3DS Max but it has taken me years (on and off) to get to a good standard with it. The modelling to UV Unwrapping stage is the biggest hurdle but you can skip that by using colour ID maps in Sketchup and sending your model through to a renderer like Keyshot.
I can't speak for Blender as I've never used it but a lot of people sing it's praises.