body measures 6-7mm. (San Antonio, TX)
You are looking in the right order…it is the nymph of one of the true bugs, order Hemiptera.
Do you have any other photos of this insect? Perhaps from a different view…like a side view or of the head and antennae.
Still looking for a more precise answer for you, but nymphs are hard to identify since they are not fully developed and do not have all the characteristics of the adult.
Please send more photos if you have them.