Hi kiranasa,
I agree, the real way to get Lord Caitanya's mercy is by following his instructions. Thankfully He has given us complete instructions so that at whatever stage of consciousness we are at, we can become elevated to the highest platform of pure love of God, where we will have never-ending, ever-fresh experiences of ecstatic transcendental love.
Śrī Bhakti-rasāmṛta-sindhu is the culmination of Śrīla Rūpa Gosvāmī's life's work assimilating Lord Caitanya’s instructions, systematically presenting them in writing, working with the other Gosvāmīs of Vṛndāvana and associates of Lord Śrī Caitanya Mahāprabhu to bring His ecstatic Kṛṣṇa-bhakti movement to the world.
Unfortunately, many devotees get stuck at the platform of Vaidhi bhakti, because existing religious organizations promoting bhakti do not present nor implement the complete path of bhakti, but Bhakti-rasāmṛta-sindhu gives complete instruction for attaining the higher stages. It is available in English for free (I posted a link in the recommended website forums and there is also a link in my profile).
Please feel free to ask any questions, and let me know what you think,
Mukuteśvara dāsa