If you scroll upward I’ve already mentioned some options of alcohol available by the glass at Hayato (wine, sake) and if you want to buy a bottle you’re also more than welcome to and just take any leftovers home if you like (or leave it behind for the staff). If you use the search function I’ve recommended quite a few bottles for the more adventurous diners here in my own Hayato review thread but it’s up to you to either ask questions or do your own further research.
You’re also free to ask Chef Go and assistants who take your drink order for descriptions, recommendations or any questions you have about their selections before making your choice, and/or what they think pairs best with whatever you are going to be eating/when you eat (if pairing matters to you).
If you are not used to drinking, then perhaps start tasting sake/wine etc, one glass at a time, elsewhere before Hayato for whatever it is you want to explore. The more you taste, the more you learn along the way. We’ve all started from somewhere.
We have an entire thread dedicated to Sake that will give you a lot of good information and hopefully enjoyment.
Bottom line: there are quite a lot of resources here put together by a lot of passionate folks. Pick up the ball yourself and run with it, have fun. Explore, figure out what you like and don’t like (there will be hit and misses along the way, treat each as a learning experience). Try different things, pace yourself (and drink a lot of water in the process, alcohol dehydrates too). More importantly, report back on your experiences as a way of giving back!