I would humbly request you to please read Sri Ramakrishna Kathamrita and Sri Ramakrishna Jivan Charitra (or Sri Sri Ramakrishna Lila Prasanga). This will give you the much needed push in bhakti and so in spirituality.
There are 2 versions
1. Slightly edited by Swami Nikhalananda - Gospel of Sri Ramakrishna
2. Word-2-word translation by Shri Dharm Pal Gupta
I personally prefer word-2-word translation.
The advise is given in simple day-2-day language.
Life of Sri Ramakrishna - Jivan Charitra:
I do not know if it is easily available in English or in your native language. But if you find it then please read it before Gospel of Sri Ramakrishna, as one should know the life of saint before one accepts his / her updesha
Please read shastras repeatedly. I told told to read Sri Ramakrishna Jivan Charitra for 8 years. After 8 years I was told to Stop reading it.
I would again say that Bhagavad Gita, Tatva Bodha and Vivekchudamani repeatedly.
Swami Vivekananda's books and Swami Chinmaya's books are well written and offer great clarity. Swami Chinmaya's commentary on Bhagavad Gita is also good one.
Good luck for Spiritual Journey.