Hi
im just over a year into my first Marine tank ownership, always assumed it was a bit daunting and complicated but finally bit the bullet and I’ve actually found it easier than keeping tropicals, initial cost outlay and stocking was expensive though, Got a 4ft DD aquarium and sump, various soft corals, a purple tang, flame angel, 2 Gobies, Cardinal, Fox faced rabbit fish, purple firefish, 4 Chromis and a clown plus inverts and a few snails.
Only slight worry now is the rising cost of electric, it already costs a good lump every month to run.