I would advise first checking the spaceship launch screen for opponents. If there exist some which have the agricultural or expansionist trait, then try to find one of them with the diplomat Bismarck and trade Bronze Working, Warrior Code, or both for Pottery. Even with that plan and all friends/enemies starting with Pottery, I think I would still research Pottery first at this level, since the AIs have a very strong tendency to research Bronze Working and Warrior Code first.
Germany's best starting build to prebuild a granary is a settler due to their starting technologies (Rome, Scandinavia, and Japan have a similar starting prebuild position). With this starting position though, with an irrigated grassland cow, and 4 mined grasslands, the capital (starting in the geographical location of the settler) can eventually produce 10 shields per turn, while also growing 2 population in 6 turns, since it can have 4 surplus food every turn (or 3 + 3 + 4 for the surplus food). This means it can produce, perhaps with a quick barracks build after the granary completes,
1. 3 warriors and a settler every 6 turns.
2. An archer, a warrior and then a settler every 6 turns.
With all governor settings changed to 'off', but emphasize production 'on', I think as an alternative it might produce more archers, but also settlers. Something like
3. 2 archers, then a settler in 7 turns. Then an archer and a settler in 5 turns.
That assumes that 10 shields per turn gets maintained though, and that will need controlled a bit differently.
The capital might also produce an archer and then a worker in 3 turns.
Since barbarians got set to sedentary, an alternative might also lie to just forget military altogether and have it put settlers more quickly to grab those huts. But, with Deity AIs and their starting units, there exists some danger that the AIs will pop those huts and get barbarians.
Not chopping the silks could make sense for a capital running on a 3 food + 3 food + 4 food scheme. However, we have 4 bonus grassland tiles on river squares for this capital. The 2nd city could planted on the gold hill and then use the silks instead. With the capital using those river squares and Bonn? Bremen? Munich? using the eastern/right bonus grassland squares, that leaves 2 bonus grasslands north of Berlin to use. A city at the 8-7-7 spot from Berlin (numPad convention) seems a suitable location at this point in time to me.
As an alterative to researching Pottery, one might set research to Ceremonial Burial (probably at 0%). Then use only one of the extra workers to try and find a hut, if Bismarck does not seem like he can manage a contact to trade for Pottery early.
Or just set research to Ceremonial Burial, and see if Bismarck can find a hut to learn Pottery. Then once Pottery gets learned, maybe start researching Alphabet.