Porn cannot be relied on for accurate information about sex. It is based on fantasies: it presents distorted perspectives on the treatment of women, on values and human relationships, on simple things like average penis size. Ejaculation scenes are often based on trickery. Porn cannot be trusted as a guide to sex education.
Semen varies in color; yellowish semen is perfectly natural. Your semen will change in color from time to time.
The force of your ejaculation varies for a number of reasons. If you masturbate often, the semen might dribble out. If you are particularly stimulated, or if you haven't ejaculated for a while, your semen might shoot some distance.
It's normal to worry about these matters. You are ok.
__________________ I hear the beat of a different drummer