I have to whole heartedly agree with Tory on this one. Instrument flying is incredibly complex and difficult to master, you need quality instruction from a qualified instructor. Two private pilots trying to blindly teach each other how to fly instruments is a very, very bad idea.
Besides that, you would have an incredibly difficult time finding a CFI who would be willing to sign you off for your checkride. As a CFI, there is no way I would touch that one.
Please don’t think that we are beating up on you, I completely get the desire and need to save money. We just want you to be safe out there.