Purchase:
2 fighters
4 art
2 inf
Eastern contingent
Move all Units from Berlin (except fighter) to Silesia
Attack Poland from Silesia and Prussia or hold if Russia stacks Poland
Western contingent
Move all units from Kiel to Ruhr
Hanover 5 units to Ruhr and one to Munich (fighter)
South/West contingent
Ruhr move everything to Alsace
Alsace & Munich attack Swiss
Sea
S5 & S10 attack S9
S7 attack S2 or aid in attacking S9 (when attacking S2 the German subs can destroy 15 ipc, but they will be destroyed by the France on the same turn. When attacking S9 they need to pass 2 mine fields).
On turn 2 your remaining fleet will move to S10 and you will buy 1-2 transports. On turn 3 you will take out the Russian battleship in S12 and land units in 1-3 Russian Baltic territories. On turn 4 your fleet will defend S10
The idea on the western front is to have France spread their forces. Most likely you can still take Belgium turn 2
The South/west contingent can attack Lorraine, Burgundy, Piedmont and Venice the next turn. Preferably it attacks Italy with the fighter from Munich. By attacking Italy the Austrians will not need to buy a navy on the first turn and with German help they should be able to kill Italy quickly. Of course adding a sub when it looks Italy will fall will definitely help against Italy’s fleet suiciding
Eastern front: Take IPC whenever you can and chose your fights. If you feel like your eastern contingent is not big enough. Buy two transports in turn 2 to attack in the Baltics with your remaining German fleet in turn 3.