Welcome to the forum.
I have a new baby aswell and he is, rightly so, very terrified of me. They’re prey animals and don’t know your intentions yet, so you have to teach them.
Sit by their cage and speak, try and hand feed them some veg or a nugget. Don’t chase and try and force them to interact with you or grab the food out of your hand, you want to show you can be trusted, or at the very least you can be the person that brings the food

For the first week or two I just speak to them while cleaning or feeding, but I don’t go out of my way to try and interact with them or hand feed them when they’re settling in.
Every pig is different, I’ve had a pig who settled in straight away and loved cuddles from the get go and I also now have a 5 month old who is still very fearful, but he knows my voice and knows when it’s treat time.
I have specific sounds for each instance, so if i’m going to pick them up I make the same sound each time so they know when it’s about to happen, I also have a “I have something for you to eat sound” and it did take a month or two to become a ‘thing’ but now when I make the sound my 5 month old and his older friend come running to me/the front of their cage ready for their treat.
This may not be what you want to hear but I hope you will find enjoyment in just watching them go about their day, watching them interact with each other and explore is so rewarding. The truth is most guinea pigs will allow cuddling, if that, but most will never fully enjoy it. So yes, trust will come by spending time with them and letting them get to know you but you have to be aware they will likely never rush to cuddle you or love being held, because most pigs aren’t like that.
It takes time, but the bond you create is so worth it x