a straw man is telling person A that argument B is wrong, therefore person A is wrong, when in fact person A was making argument C.
it is a trick to confuse your opponent and any spectators. it is most often employed by people too stupid to discern between argument B and argument C in the first place, which is to say it is most often employed inadvertently.
amusingly, most times when people accuse someone else of making a straw man argument, they then proceed to immediately make a straw man argument themselves in explaining the claim.
the best way to get an answer on the internet, as everywhere else, is to ask a very clear question to the right interlocutor.
in other words, you need to do enough work on your own to figure out what you need to know, after which you'll find that (as long as you have a decent command of the language you're expressing yourself in and the general terms in the field of inquiry) it's not difficult to get good answers.