Trichomes and what they are?

Greetings all! Since I am a newbie at growing, I have a question concerning trichomes, I’m assuming the little crystals on my flowers are trichomes? I’ve already harvested four gg4 autos with decent results, I also have 12 gg4 feminized regular plants that are all flowering, so I’m posting a pic of one of the buds I harvested showing off what I think are the trichomes, but I also think I may have harvested too soon, sorry in advance for being such a noob.