Hi @Jessica and welcome to the forum. 
Congrats on taking the first big step to reflect on this.
Many of us here, if not all!, have tried moderation and it turned out to not be an option. Maybe it worked for a few days or weeks, but would lead to heavy drinking/use and everything bad again. That does not mean it can’t work for you, but my personal view is if someone makes a serious attempt at moderation, and it fails after a few tries, then sobriety is the logical choice.
These recovery-related links that members have posted might help you decide: