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That’s all stuff that can be bought or rented, though. It’s trivial.
And 9 months before a likely start date, so were the exact details.
Unless you had a stack of suitable leftover timber and absolutely nothing else to use it for, it's madness. You'll struggle to get suitable raw timber less than Jeld-wen can supply a finished product. Without the space to easily build them perfectly flat and square, any small errors in your joints will probably show up as a twist or bow.
Yes it could be done as a first project, but you'd learn just as much by building a workbench and storage. At least you'll have somewhere to work and would be able to take it with you, if/when you move.
That’s all stuff that can be bought or rented, though. It’s trivial.