The standard rep is is between 8-12 then set the weights down, that's one set. The average set is between 3-5. If you do 90 to one hundred lifts you are going to hurt too much and not do them again. So lift them straight up ten times put them down then do that 2-4 times more to build endurance. You can hold them to the side palm forward and bend from the elbow to the shoulder in a set too.

There's lots of places to Google weightlifting for dummies. I'm just bad at the follow though tho. I have 3lb and 5lb weights that collect dust for me! . I should be doing this as its good for strengthening bones and I am losing bone mass.