Disclaimer: I am a professional diplomacy player, and before you laugh, let me give you some advice (warning, spending the last 15 years playing international diplomacy in Sweden have made my English pretty bad)

People have been saying that "Turkey is the only competent one here", and as true as this may seem now, I can show you how to win this game in about 4 turns. 1.) Let Turkey take Sevestopol. This may seem rash, but hear me out. If you defend Sevestopol now, you will be playing the rest of the game in containment ---- with each expansion of your navy you will lose bits of Russia: Warsaw, Ukraine, Livonia, and of course, Sevestopol.

2.) Once only your ship is left defending Sev, ready a FULL STRIKE on Germany. This maneuver is famously called the Red Saxon, it alone has won more RLFC National Tournaments than any other, and you are in the perfect spot to use it, as Germany clearly has no idea what he is doing. If need be, ask Italy for help, but only let him have Munich. Transplanting your dominance to a more central location is for the best. You will easily be able to cease Britain and France from there.

3.) Form an alliance w/ Turkey as soon as he takes Sevestopol, or even make a deal "I'll give you Svestopol if you don't attack me for 3 turns". Unless you've already screwed up your chances with him by dumb diplomacy (asking him to move out of the Black Sea or some BS) this should be easy. But keep a hold on him, make it seem like you are about to attack him as you pass through to Germany, a good idea would be to threaten Rumania.

4.) DO NOT worry about your lack of builds in the short run, you will soon be the very best who there ever was (sorry I'm a nerd). Also going to Germany like this will give everyone the impression that you are losing it, so surprise is on your side.

Comment ASAP if you want more help.