How can I build my first beehive?

I am seeking to learn how to assemble the proper materials (which wood), with the proper sizes and all details necessary to accurately build my first beehive with a very important prerogative: Use of materials already available and/or Lowest cost possible to no cost (though know that I’m not in the U.S.). I indeed intend to use the slabs of wood I have left over from my building work, thus re-purposing rather than buying at outrageous sums (for instance from specified companies; the idea of which I dislike as a principal). But of course if any of you are experts or just more experienced than I am in the matter, and suggest I should inevitably do otherwise I will listen (but likely not do) ;-D
I realise beekeeping is a quite meticulous practice, but also that there are plenty variations to the cardinal technique. perhaps my belief in reusing and repurposing can be applied here as well, without denying the quality required?
cheers