Burp your baby, no matter how long it takes. Keep him upright after feeding. At least for 20mins. Turn him to the left if he wants to sleep, helps with digestion (adult too!). Don’t shake the milk bottle if you’re giving formula. Swirl it instead. The air bubbles goes into his stomach which causes gas. Can add Ridwind into his milk. Buy those anti-colic bottles like Dr Brown’s or Avent. Massage his tummy in circles, clockwise direction. Push his leg towards his stomach. Bicycle for him. See example below.
Try giving Ridwind. For me it wasnt immediate but gets better over time. Colic is normal, like a phase in the initial months. Cld be due to various things tho mostly cld be tt baby is gassy. Can let him have more tummy time, the pressure on his stomach may make him feel more comfortable.