Hey @User good to have you here.
I agree, it's all about getting the building blocks in place. I think an LDO should definitely be possible for the first tapeout and will be the first stepping stone and a very useful circuit for other blocks.
I'm happy to help towards the effort, I'm already planning to design a bandgap in the coming weeks so that can also use that for the power blocks. I also suspect a few different bandgaps will emerge over the coming months.