From the photos I have come to the realisation that you are doing it wrong!
You should pump a tiny bit of air into the tube s it's barely inflated, fit it into the tyre, then start by putting the valve through the valve hole on the rim, then seat one side of bead first, then the other. Aim to work both hands round from the valve, to meet opposite the valve... The last few inches may be difficult but use your thumbs.
I would actually suggest going to your LBS or asking a friend for a masterclass though, I can see many a pinched tube on the horizon.
This is all good and well, but we haven't got to the inner tube stage yet.