looks good, i think you misunderstood some stuff.

if you're seeing pinning at this stage, you're in trouble. pinning is the mycellium making hyphal knots, which grow into mushrooms, and yours isn't.

the long strands growth you're seeing is rhizomorphic growth, which is good.

absolute darkness and ~80F is ideal. a little light will start the fruiting process but not until the jar is fully colonized. cold temperatures can bring everything to a halt.