Clutch issues. Can't put gear in while engine running

I took over this project from somebody else. Motor, Clutch and Tranny are new. I assume it never worked right.
It doesn't matter how I adjust the clutch the issue is always the same. I push the pedal and the clutch disengages, I am able to put it in gear and wheels spin. Then if I push the pedal in further I hear and feel something touching and the clutch engages again. Not able to put it in gear anymore except for reverse but it grinds horribly.

I don't think its the linkage. Sounds more like something was put together wrong and or is defective.

Now I never had to take the clutch out before. Does anybody have instructions for that job and or can explain me what to do step by step? Sorry I'm an absolute newbie and only have limited tools and jack stands. Hope I can do it myself with you guy's help!

Thanks a lot