12 step programs have never been conslusively shown to be effective. Even though they are many decades old. Beware. Better find a really good doctor and develop a really good working relationship with him or her. Do not give up your power to your doctor - rather, partner with him or her. You need your power - do not give it up to anything or anyone.

Bp is materially different from addictions. Even if the 12 step approach worked for addictions, which, again, has never been shown to be the case in the many decades of its application, this would not have meant anything for bp because bp is not an addiction.

Some of the steps you listed are blatantly inapplicable to bp. Just randomly:

Made a searching and fearless moral inventory of ourselves. (H-B: bp does not have to have anything to do with morality)

Admitted to God, to ourselves and to another human being the exact nature of our wrongs. (H-B: implies the existence of God and implies that bipolar symptomatology is a "wrong" whose "exact nature" can be discovered; a lot of assumptions here)

Were entirely ready to have God remove all these defects of character. (H-B: bp is not a defect of character)

Humbly asked God to remove our shortcomings. (H-B: it is not necessary to think of bp symptomatology as a list of shortcomings. Also, everyone has shortcomings and no God has ever been able to remove them all from any human being; a completely unrealistic hope here)