how to move an actor from point A to point B and control the speed and ramdom spawn?

hello guys need your help, im looking to move a mesh form point A to point B and spawn it ramdomly in the map and make it reach point B
and have the option to control speed

in my blueprint i used a time line with a float funtion A toB and a length of 15 , but i dont know how to make actor to have diferent speeds
i hope i can explein my problem my English in not good at all