If you want a GmbH quickly there are specialized lawyers that maintain a pool of freshly founded GmbH's for you to buy. Everything is set up for you to start. If you don't like certain things like the company name, you can always change it later.
That being said, I know plenty of people who founded their GmbH themselves and it went smoothly. It's not that it can't be done, it's more that OP chose an overly complicated and untypical scheme and was surprised about the complications.