Time is not big matter..i have flexible working hours machan
Then you come from Sagarika and get off at bamaba
It is walking distance to highlevel (2h 20min all)
most probably at 8.30 you'll be at thimbirigasyaya
do same for the evening or if you have time go to maradana and get in
if you can tell the exact place you want to go and from it will be easy to help
using a highway transport is not worthy to come to colombo
It will be worthy to come homagama, kottawa, battaramulla like suburbs of colombo