Dvaita interprets that unmanifest abode does refer to either of following:
Supreme Lord Himself
Resplendent form of the Supreme Lord
According to Madhvacharya's Bhashya on Bhagavadgita:
Sanskrit Bhashya: avyakto bhagavānyaṃ prāpya na nivartante itimāmupetya [8।15] ityasya parāmarśāt।avyaktaṃ paramaṃ viṣṇuṃ iti prayogācca gāruḍe। dhāma svarūpaṃ ...
Once a person asked Ramana Maharishi " How can I become qualified for SELF enquiry?" to which Ramana Maharishi said "Did you just now utter the word 'I'? Then you are qualified." Truth is your birthright. For going to a Guru we need to have Sadhna chatushtaya but not for reading/knowing/ enquiring.