Yes, good start Joshua, as j.gardam stated above that’s a pedal note below the normal range / harmonic series of the trumpet, which starts at F# below the staff (all three valves).
You appear to be “playing in the red” a bit to me–it’s good that you’re open, relaxed and forward and appear to be passively releasing air through the lips, etc. As Greg says, that’s a great place to start, but we can’t play the entire range of the instrument this way.
My lips are on the thinner side. What works for me, is I place the bottom rim of my mouthpiece right under my bottom lip where the skin is no longer red. I keep my throat and lips relatively relaxed and allow the air to separate them or think “Ooooohhh” once my lips are inside the mouthpiece, then I release air through the lips and objectively observe what happens–if only air sounds, then that’s ok, I just make minor adjustments to the “aperture corners” to try to reduce the aperture a bit or adjust things until a sound comes out.
This way, you’ll probably either get a C (assuming no valves pressed) below the staff (most likely) or a G on the staff to sound.
From there, you can begin to experiment with the valves and observe what happens.
When you say “Newbie”, how new on the instrument are you? This will help us better answer your question.
Good luck and Welcome! This is a great resource to develop properly on the instrument and avoid some of the problems that some of us old guys encountered when we were your age.
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