Which means ones the first transactions is comfirmed others will follow suit?
Not necessarily. This will depend on the fees as well. The mempool is currently full around the clock. If those transactions were not broadcast with big enough fees, expect waiting times for days. Additionally, even if your first transaction gets confirmed, it doesn't mean your 2nd one will be confirmed as well.
The reason is again the used mining fees. If the fees for the 2nd transaction are much lower than for the 1st expect additional days of waiting considering the current state of things.
But usually the mempool tends to empty a bit during weekends.