Premanand Maharaj Ji
Can I skip effort in bhajan and just trust that Bhagwan's grace will carry me?
Effort in bhajan is a must; idle trust is not enough
Alasya (laziness) and pramad are great faults in bhakti. Saying "I cannot do bhajan but I trust I will reach Nikunj" is completely wrong. Make an effort at bhajan, and then everything happens by grace.
Do not just rely on trust. Trust is considered firm only when your conduct is pure and your remembrance of the Name is going on.