Your stats would indicate that you do not yet have a decent grasp of game mechanics. I think this guide should only be done if you've reached yellow/green recent. Play some mid tier until you've grasped it mentally. Then continue grinding the line.
What I did was mess around playing random tanks I found fun, working out a few kinks along the way, then when I reached light green recent, I decided to be serious about a line, and saw rapid improvement. This is where I am after reaching the 10.
Unless you're playing arty. I don't even know if it makes a difference.