Welcome to the friendly bunch 
As you have found out there are loads of helpful people here
I'd just like to add that it's common for a mouth to lung device like the juul to produce a very good throat hit. So that needs to be taken into account. As for the other side of things see if you can get the juice adjusted to 36-50mg/ml. So you're at 15mg/ml and you need that to go up to 21-31mg/ml dependiing on what strength you need.
You may want to pic up a sample bottle of the freebase nic variety at around 18-24mg/ml to see if that helps as freebase nic has much more throat hit....hope that helps.
Good luck
As you have found out there are loads of helpful people here
I'd just like to add that it's common for a mouth to lung device like the juul to produce a very good throat hit. So that needs to be taken into account. As for the other side of things see if you can get the juice adjusted to 36-50mg/ml. So you're at 15mg/ml and you need that to go up to 21-31mg/ml dependiing on what strength you need.
You may want to pic up a sample bottle of the freebase nic variety at around 18-24mg/ml to see if that helps as freebase nic has much more throat hit....hope that helps.
Good luck