Lotta whataboutism there. While cannabis use can trigger schizophrenia in those who are already predisposed to it, so can things like a period of stress, the loss of a loved one, or a car crash. If cannabis caused schizophrenia to occur in rates higher than the baseline we would know by now; it’s been in wide use for long enough that any conceivable lag period has been accounted for.

The University of Chicago Medicine article here suggests that CBD actively binds to sperm cells, so any impact on fertility should be reversed given time.

we found that a certain part of the marijuana compound (CBD) had affinity to latch or bind to receptors on the sperm’s structure, altering its shape and function, which can ultimately decrease fertility in men.

How much time, good question - more study is required (and is ongoing), but your concerns appear to mostly be over nothing.