I need help installing on Huawei HG655b

I have scoured through pretty much all forums trying to flash OpenWRT on to my router. However, the guides have proven too complex for my understanding and I need someone who has flashed this model to explain to me in layman's terms what I need to do. I tried flashing through tftp after installing it on windows and launching it in cmd, following this template: f, but I just obtain f is an unrecognized command. I have obtained the relevant bin file for my model, so I request anyone who has already flashed their model to walk me through this as simply as possible. Please don't link me back to the 18 page discussion forum for this model's router, as I already went through it, and it has proven quite difficult for me to understand.