The Red Army, in late 1920, had around five million soldiers. Some 3 to 4 million of these would have been peasants, and many would have had trivial or no training (at the same time, former Imperial forces served as the origin of both the Red and the White Armies).

The White Army was much more fractured, and encompassed a multiplicity of viewpoints, tethered by 'anti-Bolshevism'. It's not until autumn 1918 that Kolchak rises to power, while the Red Army was much more unified in 1917. You'll see numbers range from 1 to 2 million (some Soviet historiography claims as few as 300,000). At any rate, yes, the Red Army had significantly more troops, but it also had significant support from the rural population whether or not they were actively fighting.

I would take a look at Chapaev for a very interesting source on the memory of the Civil War, and depending on what kind of project you're working on, you should look into the relationships with the peasantry between the Red Army and the White Army.

Figes, Orlando. "The Red Army and Mass Mobilization during the Russian Civil War 1918-1920." Past & Present, no. 129 (1990): 168-211.