Especially with ASC, if you're used to not being confident there will likely be a period of internal conflict, where your preexisting lack of confidence will clash with the newly instilled confidence from listening to the sub. This may manifest as arrogance and/or cockiness if your previous idea of absolute self confidence is that because you'll likely feel that to express absolute self confidence is to go from the low extreme to the high, but eventually it will normalize and will moderate to become confidence without the internal conflict. This conflict is usually known as cognitive dissonance or incongruence.
A Better Alex (ISTJ): EPRHA → ASC → AM6 → …
A Sexy Alex (ESTJ-T): BIABWS+DAOS → DMSI → …
A Better Alex (ENFJ-T): AM6 → …
A Sexy Alex (ESTJ-T): BIABWS+DAOS → DMSI → …
A Better Alex (ENFJ-T): AM6 → …