Is shortening the engagement period to one month considered normal and not a cause for regret, as long as the suitor has no right to see or speak with his fiancée during this period?

When a girl reaches puberty, it is best to عقد (perform the marriage contract) with her and consummate the marriage immediately. If consummation is not possible, then the contract should be made and the consummation delayed. This is better to avoid falling into haram (forbidden acts) and to enable the engaged couple to speak and meet.