ok i want to design and make my own custom molds but i have no idea how to or where to even start. do i make it out of wood first and go from there, or do i carve it out of clay or something. i have no idea. *sadface*

Can...you...DIG IT?!

there are some great video tutorials on here about making hoods. That would be a great place to start getting information. Its not something I would recommend jumping into and after you feel you have read enough start small. There is a lot to learn before you go and make car frames, esp at an engineering and safety stand point. Search monocoque style builds on youtube. I know konigsegg touches base on how they build there chassis this way out of cf and such. once you get up to the level of making factory hoods that already exist and feel that custom stuff is the next adventure you will already have a ton more knowledge just from your own mistakes let alone what you have learned from this site and others.