Take all advice with a grain of salt, even this. Maybe especially this, but I hope it helps.
One of the defining factors of the medium we roleplay in is how hidden most activity will be. I'd say even on games with a culture of publicly logging everything, that still holds true, in so much that other people won't have the time to get the context from that activity. So in general, only a small sliver of the work you do will be visible and noticed, and I think a staffer is kidding themselves if they believe they know the full extent of anyone else's contributions, or if they are involved in problematic behavior, how far that goes. This makes it very, very, very easy for an awful lot of people who are receiving basically equal staff attention, to think the distribution is extremely unfair. It also makes it very, very, very easy to -give- an unfair distribution. It is likely for people not even remotely involved in the game, with not even the smallest bit of context, to shit talk you on your efforts and your choices there. They are doing so because they have spent years and years in the hobby, and desperately need to believe that gives them the experience to speak from a lofty perch and validate that time, even if they have been doing things hilariously wrong for that entire time period. Some people give good advice, but also bear in mind that it is very unlikely anyone giving you advice has kept a game running for more than a year or so. So yeah.
Second, the largest criteria you should judge anyone, player or staff, is by how well they handle situations that go wrong. How they deal with frustration, how well they deal with RP shut down, how well they handle a conflict with a player they don't click with, how well they handle someone else losing their temper at them, how short their own temper is, and so on. It doesn't matter a damn how nice and positive someone is when everything is going their way- most people are. All that matters is how positive a member of the community they can be when they aren't. Know that everyone will also judge you by how you deal with them based on how that person is when everything is positive and great, except if they have had personally bad experiences for it. This means staff are loathe to punish anyone that they have not -personally- had bad experiences with, and you will pretty much never, ever be lauded for protecting anyone from abuse unless other people have personally experienced that abuse. Since this is a creative hobby, and most people aren't exactly super creative and driven to create things when a ton of people who have no idea what is going on are calling them worse than Hitler, it isn't exactly a surprise that most games collapse as soon as the initial honeymoon period is done. I'd say depending on how things go, you'll have maybe 2-3 months. I lucked out imo by getting a longer period since I think original theme and interest in something much different gave me some more time- I thought I'd have the kind of rants like a month or two before I did. But I mean, someone is kidding themselves if they think it won't happen unless you keep the game tiny and with a super small circle of people you all know. Like, I also don't think there's anything -wrong- with a game only lasting during the honeymoon period when everyone is super hyped about it. As long as people have fun, it was a success. But if you wanna make something longer than that, I'd be prepared for how people will act when they start to lose interest, begin to feel bored, get frustrated with their stories and need someone else to blame for that- that'll be you.
And it really is you. Whether the game succeeds by your own metrics will just be how passionate you are and how much time and energy you are willing to invest, how long you can sustain it, and how many like minded players and staff will share that vision, but also be willing to be reasonable when things go in a way they dislike. Building a game is not that hard and honestly a lot of fun, everyone is hyped to be working together to create things, and it is easy for disagreements to be brushed over when everyone is having fun. You just either have to be prepared for when that easy part ends, or make your peace with not going past that point- if you stop there, no shame in that. Long as you and everyone else had fun.