LOL no worries it sounds complicated but it's pretty easy!
SWAP.HIVE is basically a token pegged 1:1 with HIVE. To transact on NFT Showroom or any other L2 dAPP you need swap.hive so you deposit for example 20 HIVE and get an equivalent amount of a pegged version (they charge 1% fee for converting)
We have an interface on our wallet page where you can just click deposit and it will convert:
RE: First one who comments gets free art!