I highly recommend you grow a plant naturally and just bend it when it gets taller in veg and watch what happens. Advanced techniques are for well, the advanced.
I never cut my plant up. It stresses them.
I just use LST. This plant is 30" tall and about that wide. It will likely yield over 4 oz. of dense tops.
I grew it 14 inches tall in veg and bent it during week 2 of flower and when it branches up and needs it just stake and tie it to fit.
Or do it in veg then flower it like a little bush. All of the original branches are on this seed plant. And most of the leaves.
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Hope this is helpful. I have never manifolded a plant before. I just like to keep them happy. They return the favor.