What skills and tools do i need to build this?

Hi all



I come from a wood/composite background but would like to learn metal fab for the soul purpose of building this little olden day lifeboat:











I see a lot of compound curves and realize i will need to roll sheet metal but have no idea how i would figure out how to size the plates ready for rolling.



I want to build it out of 3mm steel.



If someone could point me in the right direction to get me started it would be greatly appreciated.



Thanks