Welcome to the forums and the ever exciting world of budgie ownership!
It's great you have been taking advantage of the vast information found here at Talk Budgies!
Now onto your budgies, the first one is a boy and he is a sky blue recessive pied budgie, he has other mutations mixed in, he is likely a dilute.
A photo showing his back would be helpful.
Your second budgie boy is a light green pied. Due to his markings and the deep purplish colour on his cere I'm unsure if he is a recessive pied or a combination pied (mix of dominant with recessive pied).
As for your latest arrivals, the budgie on the left while it's a bit far away, it seems like it has a uniform pinkish coloured cere, if that is the case, then he is also a boy. He is a sky blue normal budgie.
The last little fellow is a boy, I think he is a mauve greywing budgie.