Seems like I can't get past the iron age because the melting pot just doesn't work.. I made the tower 15 blocks high, added a TA1 lighter and stacked charcoal ontop of it (acording to the manual and few youtube videos) but, when I light the TA1 Lighter with flint and steel, nothing happens, the charcoal doesn't burn and the flame doesn't appear. There's a high possibility I'm dumb and made a mistake somewhere but I hope I can get help here. Until then I don't recommend it.
edit: figured it out, you need to use only cobblestone and not anything else, I was using cobblestone paired with Bauxite cobblestone so it didn't work. I ecountered the same problem while trying to get charcoal. It didn't work with savahna dirt and only with normal which I had to travel to get.