CHEARS

It's better not to give powder milk because it may contain bacteria that is harmful to the baby. Until 2 or 3 months you have to breast feed your son

I would like you to prefer breastfeeding than powdered milk. Since the baby is one month old to get sufficient amount of nutrition and vitamins, breastfeeding is needed.
Babies digest powdered milk more slowly than breast milk.
So prefer breastfeeding if not possible you can provide powder milk. But take all the measures while bottle feeding and also make sure you provide sufficient amount.

Yes you can.