shifting problems

Or what is actually going on because we have not gotten a clear answer yet.

So is it hard to shift into every gear and grinds in reverse?

If so, it could be about any of the things posted above.
In a car that hasn't been messed with by a bunch of people it usually is caused by a misadjusted or worn out clutch or dragging pilot bearing. (and sometimes fluid type used)

Reverse is different than new cars, as you push in your clutch, put it in first and THEN into reverse.
This stops things from spinning before you try and put it in reverse which does not have a synchronizer ring.