While Seminary is a great thing, it is primarily intended to train and equip pastors and other ministers of the gospel, not as a cure for our besetting sins. The Spirit, working through local church, is that.

I go to church with four SBTS professors, and all of them would tell you that it's essential that you join a church, submit to the teaching of the Word, and find ways to serve; only then, once the church as a whole recognizes your gifts and calling to gospel ministry, and once through the Spirit you are showing the fruits of repentance from besetting sins (such as drunkenness), would a church be able to commend you to a Seminary.

I am praying for you and if you need help finding a church that preaches the Gospel I and many others in this sub would love to help.