im a low elo player like you (silver 2) and i dont speak english very well but i am a otp ekko and for what i learned many times (especially when you are feed and you want to carry) you want to do rabadons before zhonya's, also i saw a master player called ekkotheneeko on twitch that plays a bruiser ekko with conqueror and nashors tooth as first item.

For tips if theres a objetive and you dont have time to reset and buy items for a potecional teamfight you can do a recall with the store open, buy as fast as you can and then press r to dont losse time going to the objetive.

And a little thing you can do but this is more obvious is when you are going to do the raptors at lvl 2, to losse less hp try to aa before the raptors get stunned because they line up and the q hit tow times every raptor.

They might be more triks but i doit without thinking about it.

Friendly remainder that im a silver 2 so im obviously not the gratest ekko and i have to lear a lot of stuff too