Such as the images below https://www.google.com/search?q=paint+brush+stroke&source=lnms&tbm=isch&sa=X&ved=0CAcQ_AUoAWoVChMIvs-Dxt6zxwIVwrKACh0MjQJX&biw=1920&bih=971#imgrc=dXKuef3t-hXd8M%3A
https://www.google.com/search?q=calligraphy&biw=1920&bih=971&source=lnms&tbm=isch&sa=X&ved=0CAYQ_AUoAWoVChMIiJaHpN-zxwIVwsyACh16cQlK#tbm=isch&q=chinese+calligraphy&imgrc=hHNarN1dPWQ_5M%3A
I tried searching on youtube for videos but all of them are using photoshop; the brush tool in PS had a lot more options that made it possible to draw with realistic brush strokes