bend it in a 2-3 spots and anchor the base to the opposite side of pot. Can also tie down the end. The more level it is the more evenly the growth will be. Don't snap the trunk, obviously.
bending in 2-3 spots close together will make it effortless bend down nearly horizontal, then the tie-down at end doesn't have to do much work. The anchor support at base of trunk will prevent root damage and the plant 'pulling' itself through the substrate while trying to bend back upward, and it will try to do that.
you can bend down between growth nodes so that both can easily grow vertically, or you can bend down so that 1 side of symmetrical growth is sticking straight up. The latter you are better off removing anything facing straight down on the first few nodes. I've done both. There will be no shortage of potential "top" colas in your canopy. In a smaller space you'll definitely have more than you need and some will be pruned off due to congestion.
try to work backward frmo the canopy you want and be systematic about it.. what you keep, what you prune, how you train it. Keep the canopy even as you go. If something grows faster, temporarily tie or bend it down (this breaks "apical dominance" temporarily). Let it recover after a day or two and the other stuff should catch up in the meantime. Manipulate the plant to grow the way you want.