Drinking alone can be done safely in your home. The tip is to not overdo it. Drinking moderately is important because you don’t want to blackout. You don’t want to be drunk to the point that you leave your home. That is a scary situation. One or two glasses of wine are perfectly fine. If you drink a whole bottle by yourself, you might want to talk to someone. Thes people usually want to talk. I do not recommend drinking hard liquor alone. The stronger the drink, the more you are likely to overdrink.
If you are going to stay indoors and enjoy some delicate wine and champagne, make a relaxing night of it. Turn on some soothing music and watch a movie. Make yourself a beautiful dinner to go with your drink of choice. Pairing it with food is perfect. This also helps you to not overdrink. You could also have your own wine tasting.