You won't be able to build a concrete house by yourself using "traditional" methods, if you were, you wouldn't be here asking how to do it (Catch 22), but there are more than a few techniques/building approaches that were actually designed for self-builders.
Talking of concrete houses, the "working" ones are those that combine insulation with formwork.
One example is the "Plastbau" building method, usig EPS as insulation/formwork/structure and another on is the "Isotex" one combining wood and EPS, a couple of videos on Youtube, JFYI:
https://www.youtube.com/watch?v=ythSGowrNcw
https://www.youtube.com/watch?v=VGuP2jp51g0
There are of course many more similar methods, but the overall idea is the same.
Using these kind of elements a house can actually be built by two/three people without particular knowledge/experience in the field.
Another possibility - often used in self-construction - is to "build" the whole house in EPS (in this case the EPS is in the middle of the walls and the reinforcing bar is on the outside) and then call some specialists to spray concrete (shotcrete).
An example here:
https://www.mdue.it/en/emmedue-panels
https://www.youtube.com/watch?v=8juvDvSeYL8
Otherwise there is nothing particularly difficult in a concrete carpenter's job, but you need to learn those abilities.
And you will need a "supporting" technician, i.e. besides designing the house, do the calculations and whatever else needed to get a construction permit, the project needs to be made by someone that believes in the self-construction approach and that simplifies/adapt the design to the construction method chosen.