You shouldnt be burning juice with ANY lr atty on a 3.7v device... EVER... even if it is a 1.5 ohm.
You're not getting juice to the coils... for one reason or another.
Primer is disgusting... I always rinse a new atty (unless Cisco) with hot water, blow it out, rinse again, blow it out again... thoroughly! Then, let it dry overnight (on a fan if you can)... or, if you're impatient or need the atty now, leave it in front of a blow dryer on "low" for 8-10 minutes and it'll be ready to vape...
Back to your problem... it's too dry because of a few possible reasons... Juice too thick (if its mostly VG)... try some thinner juice.
...or you just dont have enough juice in it... a fresh and dry 510 atty will take quite a bit of juice... I'm not a 510 expert, I use 306s mainly... but I'd try 10-11 drops (after its clean and dry) and then pull on the atty... You can almost feel when theres enough juice in it... too much, you'll flood it and it'll leak out the bottom. This is ok... you can vape through a flooded atty...
If you still cant get good vapes from it, you may need to look into de-wicking it... just be careful and make sure you leave the wick that runs through the coil itself. You just want to get all of the extra wick that runs through the bridge out.
Unfortunately, learning to drip is trial by fire... you just have to stick with it and eventually you'll figure out exactly how much and when you need to drip.