Those all seem easy to use. Give each one a try. Of them, LightUp is different: It first “bakes” the illumination using your CPU, and then, to navigate the illuminated model, it uses your graphics card. It’s also different because everything happens within the SketchUp view itself, not in a separate popup window. There was I time when I only used LightUp for everything, because the other programs seemed too complicated, but then I became more proficient with Twilight and used it a lot for still images.
Similarly, if you’re new to rendering everything will seem Greek to you. The programmers often don’t think the way designers do. Just be patient. LightUp can run even without any discreet graphics card. I rendered this video with LightUp on a 2013 MacBook Air (Intel Graphics 5000), just for kicks (I could have used my desktop PC):. Of course, forcing such a lowly machine to produce this was no fun. I had to optimize the model heavily and survive tons of bugsplats.
Your graphics card should be fine. I currently only use Lumion and LightUp for video creation.I no longer create stills. But if all you need are stills, have a look at Visualizer for SketchUp. It’s only available for SU 2015, but it’s free, and really, really, easy to use. Unfortunately, it’s no longer in development, so no SU 2017 or 2018 version.