If your new to cranks I would focus on the basics first. First learn to troll in depths of 9-14 ft. That will simplify a lot of variables and you will learn how much line to put out. Speed is 1.7 to 2.5. I like to 2.2 and my buddy is usually right under 2. In current just make sure your plugs are working as ground speed on GPS is obviously too fast with and vice versa. I would stay away from planners at first, until you figure out the right depth your lures run. Once your sure your crank is in the zone, just attach the board, and let out as much line as you desire depending how close to the boat you want it. In areas where there are other boats, planners are a pain.
Choice of cranks is a topic where everyone has different opinions. I have been running them since the early 90's, and it seems like some of the best ones I used then don't do as well today... not sure why? Rapalas are some peoples favorite, and I've done well with them at times, but are not my 'go to' cranks. Wally divers and bombers were my favorites when I started. I caught one yesterday on a discontinued (color) bomber model A. Flicker Shads are my first choice most days now though.
Once you've become comfortable you can try deeper running cranks and move deeper. Leadcore and snap weights are a learning curve I'm still trying to master. I've went away from lead, just because I don't want to drag more rods with and don't need lead in less than 20 feet.