Iran has been sanctioned for decades. As a result, they do not have a modern airforce, navy, or even air defense systems. So it is completely unsurprising that USIS has complete air superiority. You can rest assured that Iran has planned for this.
Their entire defense strategy post-war (Iran-Iraq war) has been centered around ballistic missiles. More recently, they “pioneered” the use of kamikaze drones (Shahed) and included their use in their strategy. Note that they have aggressively optimized Shahed when it comes to cost, ease of manufacturing, and ease of launch. Shahed drones have seen extensive combat usage in the Ukraine war.
The other “hint” when it comes to Iran’s response is the increasing estimates by the US as to how long this “operation” will last. Initially, it was a few days. Now they are saying 4-5 weeks. Edit: Looks like it could up to 8 weeks..
Long story short, until we start to see significant degradation in launches - both missiles and drones - we simply cannot say that Iran has been defeated.
As far as news sources go, the easy recommendation is Al Jazeera. Twitter/X is also decent, but there is a ton of noise.