Welcome to the forum. If you are in the Tucson area, I'm going to be teaching water-soluble oils at Arizona Art Supply in three, 2 hour sessions for each month from january through April. let me know if you are interested and I will give you more detail.
Meanwhile there is tons of information here. I tone my canvas by tinting my gesso with acrylic colors, let that completely dry for a day and then put a fine film of walnut oil over the acrylics as a lubricant to make the WS oils brush on more smoothly.