I think you're on the right track. I remember being overwhelmed when I was first started taking pictures in the studio.
For manual "studio" camera settings try this:
Additional suggestions:
You're off to a good start and asking great questions. Since you're using continuous light built into the lightbox, the main variable I'd play with would be shutter speed. I would keep the ISO as low as it can go (seems like 100) for noise purposes and I'd stay at F10 or F11 to get more in focus. I'd aim for a light grey background color that can easily be changed to white in post while still keeping some natural shadows. I find that if you aim for a pure white background, you're going to get this flare effect on the sides of your product like in image 3.
I would also recommend moving your camera slightly further back from the subject or moving the subject further into the tent because you're getting a slightly distorted look. The bottom of the keyboard should be straight, but you'll see that is curving and that's caused by how close the subject is to the lens. There's a reason why 100mm+ is popular for e-commerce photography. This added distance will also help with getting more of the subject in focus.
Also look into shooting tethered to rule out any chance of camera shake, but I guess your self-timer of 2 secs sort of handles that.
You're shooting RAW which is great. Once you've found your optimal shutter speed, I would shoot an option with a grey card (example) so you can set your white balance in post