is it ok to have doubts on some of the teachings, whereby I have
doubts it was uttered and taught by the Buddha.
I certainly couldnt agree more with the 4 Noble Truths (The best
of all truths), Noble Eightfold Paths (The best of all paths),
rebirth, karma and dependent origination, cause and effect.
Then you need to make an earnest effort to address the doubts.
Make an adithanna wish also to meet the True Dhamma whenever you
perform merits.