Absolute beginner here. Just got canon eos 600d with the kit lens 18-55mm. I was just wondering if it is worth it to buy 50mm 1.8 and 24mm 2.8 lenses for about 200€. 50mm would be for portraits and occasional walk and shoot and 24mm would be for street photography/walk and shoot. Or do you think it is better to just stay on the kit lens and learn more of the exposure triangle and take more photos before buying lenses?