Lot to unpack here.

Hitler as he discussed in detail in Mein Kampf wanted to create a German superstate capable of rivaling the United States in terms of its economy and population. To do this, he proposed something we call "lebensraum".

Germany was too small population wise to ever be a global power. So, the idea was that Germany would conquer Eastern Europe (which was filled with Slavic peoples that Hitler considered to be "subhuman"), kill/deport most of the adult native population, have ethnic Germans settle the area, and eventually through breeding "aryans" enough, have an ethnostate controlling all of central and eastern europe.

So a conflict where Germany attacks Russia is inevitable. But why attack the Soviet Union when they did? The Molotov-Ribbentrop Pact heavily favored the Soviets in the long run, and both sides knew this. The most lopsided part was how trade was conducted. Germany NEEDED oil, and they pretty much could only get it from the Soviets. That meant the Soviets could change the cost or cut the supply altogether whenever they wanted which is pretty dangerous for the Germans. Both sides knew that the agreement would only last a few years. The Germans, after realizing that the British weren't going to surrender, decided to attack the Soviets in late spring 1941. This was pretty much the best time they could attack. Before then, the Soviets wouldn't have begun the massive rearmnament and reorganization of the Red Army. And after then, the Red Army would be completely reformed and the Germans wouldn't stand a chance.

Got off topic but does that answer your question?