How do you make the Entente accept the peace? The problem really isn't Germany offering it (although I think that is extremely unlikely given their position in February 1918). It is the Entente actually accepting it.
Any attempt at sweetening the deal (like returning AL) would be looked upon as a sign of weakness by the Entente. Also in February 1918 Brest-Litovsk hadn't been signed (yet).
I think Germany has to roll the dice with the Spring Offensive and hope that the French government collapses first.
This is why I think the date chosen is too late. And I will chose the different path, keeping the USA more steadfastly neutral takes motivation from the Entente as Russia falters and the Czar falls. After 1916 the money is running low and the blockade is taking hold, A-H and OE are weakening, a victory to the East is uncertain but achievable, the Western stalemate takes a release of troops to obtain any hope of breaking, making events in Russia more decisive. Have the Provisional Government strike an armistice, uncertain enough that Germany can ease off but not relocate forces, its supplies are drawing down and it can no longer hope to simply conquer food. In that you might get an offer of status quo to the West, a withdrawal from Belgium and France, keep A-L and return colonies, mediated by the USA. I do not think it ASB although I find it a very steep wall to get your hat over. Germany has won Congress Poland and some portion of Lithuania and modern Latvia, supporting insurrection in Finland, securing the West and not in a position to be defeated, yet. That may be enough to give Germany its honorable out. You need the Entente to be sucking fumes to agree, but I think Britain can and if it does France has no options.
As to if the Kaiser can do it, he is the Kaiser, his Generals will step in line, even Hindenburg would not disobey the Kaiser despite having little qualms in letting him abdicate to save Germany after losing the war, as to Ludendorff, he is not a "von", he would be dead before he lifted his treasonous finger, but I doubt he gets that off reservation. The power of the dictatorship is in Wilhelm's weakness, not their strength, if Wilhelm finds the spine, the Army will stand firm. Is it ASB for him to find the courage now? Maybe, but he was just enough humbled to perhaps put the nation before his glory long ago fleeting, it might be the perfect time for him to be mercurial.