Quitting completely is a really safe choice.
If you don’t drink, smoke or use, you can be sure that you won’t have problems because of alcohol/other drugs.
There are good reasons to at least try a period of quitting completely, especially to find out what it’s like to live without alcohol/other drugs.
It will also help you notice how you may have become dependent on alcohol or other drugs.
Quitting completely will help you to break your old habits, to experience some fairly large changes and also to build some confidence.