It's totally drinkable at that point! If you haven't been sampling throughout the process then you haven't had a chance to learn! That being said your wine will be nowhere near its potential at this point. For lighter reds/ extract kits without grape skins a month or two will allow your wine to develop to it's full potential. For heavier reds you can expect to wait upwards of 6-12 months for your wine to fully mature and develop the flavor and character that you would desire from such a wine.

*link to bottle shock article

Beer bottles and crown caps can be used for wine storage, the issue that arises is when your wine is in contact with the seals.  If stored on their sides, the seals on the crown caps will eventually degrade, resulting in quick oxidation and potential leaking.  However, if stored upright these caps will keep a seal for years, and will allow no oxygen transfer.  This will result in a much slower bottle aging process, and can be a good method for rose wines or whites.