picking guinea pigs up

I just adopted two guinea pigs from a home that had too many. They are about 3 months old, sisters. This is the first time they're away from their mom and brother. I want to take care of them perfectly and have so many questions but no one to ask. these are my first Guinea pigs. The cage I was...

I had my guinea pigs for a month and a half. I just realize they may be 5 to 6 months old not 6 to 7. My guinea pig still won’t let me pick them up and will get mad at me if I try. Do you guys have any tips? Thank You!