13 months baby boy

Hi,would like to ask is it normal for a baby boy to not want to walk or stand when we assist them to walk.He can stand by himself but will fall seated after that.Tried to help him to stand but he doesnt want it.When i carry up to stand position he will bring up his leg up as in doesnt want to stand up assisted.But he still can stand up while pulling up his walker or by the side bed n cruising.What can i do to help him stand n learns to walk?