Don’t listen to flammers. I too am working on an mmorpg and i think it is an excellent idea. I have been working on my game for about 3 years now SOLO and have came across some pitfalls
but not much with the unlimited resources out there and websites that sell models, the marketplace here and lots of other things like the thousands of tutorials on . you can do anything you put your mind too. If anyone tells you differently ask them to show the game they are making. just because you work by yourself does not mean anything at all. it just means you will take longer than other teams that have more developers. Ignore negative people that tell you you CAN’T they only say you can’t because they tried and failed. but that don’t mean you will fail. I know many people that do wonderful things using unrteal engine and they don’t need huge teams to do what they needed to make a game. with unreal engine even a 7 year old can make simple games. a complex game is the same as a simple game. just requires more work. think of it like this: if you make a game where you are a fish and you can swim around in a fish bowl. this is pretty simple. then you add sharks that can eat your fish still simple. then you make it multiplayer, then you make the fish have quests to save other players by feeding them it has now went from a simple fish swimming game to a mmorpg Don’t limit yourself DO WHAT YOU WANT TO DO. a large game is the same as a simple game when you are making a small game or a large game there is no limit. think of a large game as a collection of mini games. there are series about making rpg style games to wet your beak. this guy has some really Amazing tutorials i think would get you up and going starting with your mmorpg check out his tutorial series and go from there