Every morning before I go to school I like to do some weights. The weights I use are only 2kg but I can repeat each movement as many times as I like without hurting myself (I do 20 repeats for each movement and hold the last one for 20 seconds). If you are starting out with weights I suggest using the lightest ones you can find and move up weight size as you get more confident and it gets easier.
When I first used weights I used 1.5kg and then moved into 2kg when it got too easy. Eventually when I find the 2kg are too easy for me I will use the 4kg ones. Anyway, here are the weight movements I do (I’m sorry I don’t know the name of them or what part of the arm they help) and please ignore my face in all the photos 🙂