Dive chart for that small of a rap, long lining without lead, should be pretty easy to DIY. Guessing you are not trying to get much deeper than 10-15ft otherwise I would think lead would be easier.
Get line counter, start trolling at your desired speed, hold rod in hand, let out till you start ticking bottom at your desired depth. Crank in line at that depth until you are intermittently ticking bottom and see how much line you have out. Do that at maybe 5ft, 10ft and 15ft, see how much line it takes for each and extrapolate for depths in between. Should have your own curve in about 5 minutes.
used to long line #5's a lot, but usually only in under 10ft, I'm thinking it'd be hard to get that lure to 15' without some sort of added weight, but I could be wrong.
Just go cast them, it's much more fun.
