"People did not have freedom of religion & were expected to go to church as often as possible "
There were no Manx equivalents of the English anti-catholic penal laws however you are correct in that conformance was expected and often reported against - Roman Catholic practices (and thus I presume beliefs) lingered much later in the Island than in most of England though NW England had significant pockets of recusancy.

The custom was very strong that brides married in their own parish - very few Manx used banns, most (99%) used licences which required one or both parties to reside in the parish in which the marriage took place - to marry outside of this parish needed a special licence (apparently not that difficult to get merely more expensive) - it was Bishop Wilson in a number of decrees that tightened up on the rather lax practices of marrying couples by night, without licence etc. The Michael/Ballaugh border issue for Bishop's demense families had lingered on for considerable time - the demense straddled the parish border (a stream that actually ran underneath the chapel at Bishopscourt! where some of the demense families were married) - the major catch was that Ballaugh church - the old St Mary's was a long way down the cronk road and Kk Michael was nearer but the ballaugh vicar then didn't get the fees.