Build Yourself - Which Tasks to Perform?

Building it yourself is really great, above all you can be proud of yourself afterwards and show off a bit in your circle of friends :D. However, you should not overestimate yourself, because the way houses are built nowadays (electronics, insulation, etc.) has changed significantly. I think you definitely have to hire a professional at some point, sooner or later.

So I myself have not built a house yet, only helped a lot with renovations so far, and I will definitely do all the interior work myself when building my house. So laying electrical wiring (connecting will be done by a friend, an electrician), laying floors, plastering walls or drywall, so basically everything except the shell construction and the exterior plaster, I want to do myself.