Here is where you need to go to learn about casting:
https://castboolits.gunloads.com/forum.phpOnce you know what you want, you can start to source products and THE product.
My advice- don't buy anything Lee. They are junk products and only lead to disappointment. And yes, I have been broke and still bought good quality casting gear. Lyman, RCBS, Accurate, NOE, all make great moulds.
Research a bunch before buying. Good luck!
_________________"To compel a man to furnish funds for the propagation of ideas he disbelieves and abhors is sinful and tyrannical." - Thomas Jefferson