I'm an experienced Bitcoin user, but never touched any "decentralized" exchange. It's often not really decentralized (so it's refreshing that you at least refer to it as "semi-decentralized", requires downloading and running software, and requires (wrapped) "tokens" and "smart contracts" on chains and networks I (and most people) don't understand and can't verify by myself.
So, before I decide if I'll join this test: let's say I have some Bitcoin testnet coins (which I do) and want to exchange them for Monero testnet coins. How much effort do I need to put in to do that?