How to get from damai perdana to nottingham semenyih?

from what i know, i could take rapid kl 406 to taman segar, then take u40 to terminal kajang, then u415 to terminal semenyih. is it right? i need more options in case the bus doesnt come or something haha. i'm a newbie in public transport. so can anyone help me out? monorail, lrt, ktm and whatever is ok too. (taxi is not a solution because my mom's paranoid)