Usa seem to be doing the exact same thing, what’s your plan to defend from usa if they decide to invade your country like they did with iraq?

We don't live right next to the US and haven't had to deal with their bullying and hostility for gods' knows how long. So Russia seems a tad more likely candidate to attack us. But the military isn't just for a single target, even if that target is the most likely one. So the strategy I assume would be similar in very broad strokes of utilizing a large, trained reservist pool to fight the US.

Russia invasions are made possible thanks to billions of public money spent on weapons and because of mandatory conscription. If your goal is peace and not invading other countries you want to do the opposite of what they are doing.

So what would that be, spend very little on defence and rely on just a volunteer army?

If someone decides to attack you, you will defend yourself better as a free man not as a chained slave

Pretty unfortunate if reliance on just that ends up with me being an even worse sort of slave, this time to Russian masters.