First off, it would be useful to learn a bit of basic Japanese grammar -- A little goes a long way!
Second, there are a number of ways to phrase your phrase. One thing to be aware of when phrasing things in Japanese is the Subject-Object-Verb order, which is contrary to languages such as English, where we utilize Subject-Verb-Object order in sentence structure.
Third, you have to take particles into consideration. For example, the は (pronounced 'wa') particle marks a topic. The を (pronounced 'o' or 'wo' with a more or less silent w) marks an object to which a verb is being applied to. This particle might be the one we need to use here.
Next, the kanji you used for 'void' is only a part of the full word, which is most commonly an adjective for something that IS void (here, the word 虚しい 'munashii' is the adjective in question). It is possible to turn this adjective into a noun by changing the last い into さ, making the word 虚しさ 'munashisa', which is likely the "void" you're attempting to describe.
Also, the する-verb you selected 擁する 'you-suru' refers to a having. You may want to try the verb 抱く 'daku', which is probably closer to the idea of embracing something. Then, in order to turn this into an imperative conjugation, you may try the soft way, which is turning it into a て-form (抱いて） which implies asking someone to 'embrace the void', or otherwise use direct imperative form 抱け 'dake' to direct someone to 'embrace the void'
So, with these clues, do you think you can put the phrase together? ;)