Well, I quickly discovered that if you have living relatives, it's only a matter of time before they start trying to take control of the process, lol
Most things were worked out between my wife and I, but we had similar vision of scope from the start. There was a lot of keeping up with things though. At the beginning you have to lay out all the things you want, and hop to it because everything needs to be booked a year in advance (that may have improved now that we're farther away from quarantine).
But you have to get the venue first and set a date. After that you can contact everyone else you'll need (bakery, DJ, flowershop, catering, photographer). They'll all put you in the calendar, but then it's the waiting game until they will let you make decisions about 6 months ahead of time. Then a few weeks before the date all the bills come through, which is its own hassle.
Then of course you have to get save the dates and invitations, coordinate with who's going to be in the wedding party, the officiant (if you need one where you live or just want one), suits, dresses, accessories. Do you have to provide tables? Chairs? Silverware? Who's setting it up?
Then there's rehearsal the day before, which for me was the peak of the stress, and assuming you've done everything right the day itself will go smooth, but it's basically at least a year of having a part time wedding planning job.
That being said, if you have the cash to hire someone to do everything for you, be my guest. But as costly as things can get, shooting for smaller is my suggestion.