er... i think best is get a set where you can have a lil more comfort and change the tire to 195/55 R15 get Falken 912, Hankook V12 or others entry level tires like Yokohama A Drive or Dunlop D-01..

BTW Myvi 14" user skip Conti CC1 by all means... it has a problem which we call it bi-lateral offset for the tire which cost you hard to get a good balancing, and slight bumpy feeling (like bulged tire side wall)...
i got 1 set on my old toy which weight about 1.3 tonne++ used about 6 months had this problem already... regret should have stick to Michelin XM1 or Falken 912

mostly klang but u can try out some shops at PJ or Seri Kenbangan...

well u can... eh that is not 15 series la, those are 15" rim la...

that will works if you want comfort but of course u need to need to drive a bit more carefully...

well hard to say whether it will hit ur fender or not but i do not recommend coz it will not give you the comfort when u go to 16" wheel on Myvi... and 195/50 R16 has very limited choice of tires...

try 195/55 R15 should be ok... on that size try Hankook V12 (performance with a lil comfort) or Falken 912 (comfort with a lil performance)... fit in the stock suspension system it shall be fine...