Hi, you can't earn RLM in Realm with default NFTs, you need to buy one from the market (cheapest go for something like $0.70). I'm earning passive RLM, not playing but I do have 3 of the 5 star leaders. My initial investment was under $5. Check YT videos for strategies the game is easily profitable. Also DYOR.
I'm still playing Century Train just to hunt down commodity culprit :) Once I got $18 NFT from it. I have 4 trains and that gets me only few cents per day.
Best