I' a socialist and a pretty big fan of Rosa Luxemburg. I recently read a book about her life but one thing it didn't really clear up was how close the revolution actually was to succeeding. If anyone could answer this It would be greatly appreciated.
Some and some. But in 1919 anyway, in both cases, very little.
The German Communist Party (KPD) did not officially form until January of 1919, and most of those in favor of a social state were involved with the Majority Socialists (SPD), a party committed to constitutionalism rather than an overthrow of the capitalist order. The red menace in 1919 was greatly over exaggerated by contemporaries and quashed speedily by the forces of reaction, acting in the name of the Republic but in the spirit of anti-bolshevism.
And most Germans were disgusted by the very idea of bolshevism, especially in 1919. Attempted communist revolutions in Saxony, Thuringia and Saxony in the years after the 1919 revolution were all stamped out easily. However, after the general strike following the Kapp Putsch, the KPD, joining with the USPD, developed a formal constituency of voters alienated by the SPD employment of army units against rebellious workers. These parties together commanded perhaps a tenth of the working class electorate - millions of voters, but still not the makings of a revolution. So, though they had gained support, they represented primarily a strong protest vote, not a legislative and certainly not a revolutionary majority.
To the point: there was a very successful democratic revolution that secured many new individual and social rights. Communist Revolution was always far from success.