Hey Roxana,
There are two hardsurface modelers that you might want to watch and that have a lot of content on YT using Hops and Boxcutter: Josh Gambrell and the master himself (Topostudy): Masterxeon1001 (or mx2). You often need to cleanup your topology after using Booleans (HardOps/Boxcutter) and these two guys know all the tricks.
