So I'm getting ready to play ranked (~298 norm wins) and I'm trying to improve my build order because although I know what to build, I don't know when. I run windspeaker's but I play extremely (and often too) aggressive. Usually its:

se<ss pink<frostfang<boot<chalice<sheen<athenes<swifties<EOW<lich and whatever situational support items I need after.

I never know when the right time to buy boots is or whether I should finish my athenes before buying sheen, or vice versa w/ lich before chalice. Overall extremely confused, never used to build athenes before 6.9, but the new passive is too good to pass up.

TL;DR what's your typical early game build & first completed item?

thanks in advance from an unranked noob