bushiness is mainly dependant on amount of light the plant gets, and its genetics, it will be near on impossible to get a 100% sativa plant as bushy as a 100% indica, but in ignorance to the genetics find a good spot with lots of sunlighto directo and your plant will be pretty bushy with small internode spacing, i myself am unsure whether topping/fimming affects the internode spacing but it will give it more tops which will make it appear more bushy :jointsmile::thumbsup::thumbsup:

to minimize height u cud always try training the main stem along the floor....?:jointsmile: