Sett as ADC

So, im a main ADC and im getting tired of fighting with those guns and stuff so i wanted to fight with my fists, but i dont want to leave my fellow botlane, so i brought sett on botlane.

The point is, idk this champ at all, i feel like this pick have potential since with second wind, doran and passive ur litteraly immortal to poke, but the thing is, idk what am i doing wrong, but i cant manage to do things on sett. Idk anything at all and maybe that is the point but in-game i always end up having to farm under tower and being perma-poked, idk if im doing someting wrong or is my support doing so or maybe the jungler not ganking even if we are the whole early under turret, but i always end-up straight feeding my laner at a point that he can kill us under turret.

Im gonna need your help to understand what could ive been doing wrong about this and overall how do you play this champ, like what are some good decisions and what are some bad decisions, what do you think i should ban and what should i build, and how you die less, because imo this is the most important part in botlane. (as Sett ADC ofc) (i gotta go so i cant do it rn but i can link my op.gg if necessary to see what am i doing)