Select, among various types of wood, the one you like the most for the shape and color:
Birch - Maple - Boxwood - Mahogany –
Chestnut - Cedar - Cherry - Poplar –
Ebony - Oak - Beech - Walnut –
Olive - Elm - Pine - Oak - Teak –
Etc.
Remember that the essentials of a chair are:
Seat - Stile - Front legs –
Rear legs – Rail/Apron –
Backrest - Stretcher.
Although you can add the decorative fantasies you like the most:
Backrest base - Arms - Shell –
Curtain - Foliage - Acanthus leaf –
Palm tree - Motif - Bouquet - Scrolls –
etc.
Get the tools you think you'll need:
Adze – Brace - Brush - Chisel –
Glue - Blade - Screwdriver –
Chisel - Mortise - Gouge - Sandpaper –
Hammer - Hand saw – Lathe –
Screws – Etc.
Look for a model from the past or present that you like, or be original and invent it, and get to work. If you can find a new version of the seat furniture, you will go down in history, but do not forget that the chair is not a sculpture, but a form that must fulfill a function.