Hey so I need help on something

4 things actually. im a new player and i dont really know how things work

1. so why cant you place blocks in restricted structures?

2. why is the chunks mod not working? im sure i installed everything and it even shows up in the mods tab in options. is it ftbchunks or somehting else? ive tried changing the keybind and it still doesnt really work.

3. about clay ovens. how do i use or cure it or do i jsut use without curing?

4. i still dont know anything about the fire. do i read the terrafirmacraft handbook thats given in the game?

if u guys could help then that'd be nice. thanks