Talk to General Physician on Childs Immune Vaccine

Hi.. I live in african country and medical services in detail are really confusing. I have 2 daughters 1st is born in KHI march 2019 under 4 years born and vaccined upto 8months in KHI and 2nd Daughter born in Africa amd only 1st immunization is done.. i couldnt complete both of there vaccines upto now and i want to start again their immunization vaccines. As i read on online that some vacciness shouldnt be given if they have passed a certain age or missed that dose and have a long break. Can someone please help me or guide me regarding this for which vaccines i should start with or leave the ones which are missed and start based on the current age...