IMHO the skill to construct real structures in orbit would necessarily come after forming a commercial/industrial space station (unlike ISS), not before it. You would need significant amount of equipment and people in orbit for the long term to work on that construction, so you need a sizeable station even if it's just "temporary construction crew quarters+warehouse".
And those parts I would suggest you might as well prebuild on the ground and launch them. With New Glenn you can launch 6.3m modules, with Starship almost 9m. That should be enough, no additional blowing up required.
From there you can then build real structures onto it.
