no you're not annoying at all, thanks for the update :)

go for YOLO v3 or YOLO v4. i promise they'll be good enough for you, don't be bothered with version numbers . (if you need lighter models go for tiny versions of v3 and v4).

you can train yolo on any framework you want and convert the weights later, then load them into your preferred inference framework. ( I'm not sure about js but in python you can load yolo models into opencv as well ). darknet is the original yolo framework which gives you scripts for training the model.

train it with either darknet or python then convert the weights if you need to, there are already scripts for everything you need to do, that's why i said YOLO in the first place.

do yourself a favor and go for the good old yolo, i think it has a tensorflow.js version too.