Young Brug plants are naturally scraggly. Later, once they start to flower and the root system matures, they will branch out more. The plant will also send out new shoots from below ground giving you a bushier plant.
Don't trim it. You might be delaying the formation of blooms. Without a close-up photo of an entire leaf, it's impossible to tell whether the plant is in the vegetative or flowering growth cycle. Scroll down to the "Leaves" section of this link: http://www.abads.org/members/anatomy.htm
to see the difference in the way the leaves connect to the petiole. During the vegetative growth cycle, the leaf/petiole connection on both sides of the mid-vein are symmetrical. Once the branch switches to the flowering growth cycle, the leaf/petiole connection becomes asymmetrical.
Vegetative growth is long, straight without any branching. Cutting vegetative branches does not encourage blooming. Instead, it delays it because the few branches that develop will have to start the vegetative cycle all over again. Once the vegetative cycle is complete, the growing end of the branch starts the flowering cycle by producing a "Y" then flower buds. From that point on, growth continues to "Y" and form new buds. The length of the vegetative cycle before the formation of the first "Y" is controlled genetically. Some of the newer cultivar, bred for their compactness, will produce the first "Y" when relatively small. Others may reach up to 10+ feet before they produce their first "Y".
If you want a shorter plant of one of those taller cultivars, allow them to grow and "Y" for the first year or two. Then take cuttings from above the original "Y". Plants produced from cuttings taken from above the "Y" will continue to "Y" and grow as if they were still part of the mother plant.
Congratulations on your first Brug! You do know growing Brugs is addictive and you probably won't be able to stop at owning just one especially after you see it bloom. LOL