A lot of work ahead if they're to launch in Spring 2024.
1. How many pilots are required for the operation?
2. Again how many cabin crew to hire and train in time who will train them and where?
3. Catering? Ordering all the logo equipment. Setting up contractors where ever they fly to?
4. Ground staff handling at airports.
5. Engineering, that's a big one to sort out.
6. Uniforms?
7. Route structure and base.
I can't think of anything else, but I'm sure those more qualified will add to the list.