We see a fair number of new pipers come in here beset by fears. Burnout, cake, and smoking cadence.
My advice to new pipers is to get a few cobs and some type of unflavored or minimally-flavored leaf.
Carter Hall is a good place to start because it is inexpensive, mild flavor, low Nicotine, easily available, and because of its high Burley content, reveals by smell whether you are smoking it too fast or not. If the room suddenly smells like a cigarette, you got distracted and huffed and puffed away.
Early Morning Pipe is another great suggestion. Some of the Russ Ouelette blends, and C&D blends, that have minimal topping are excellent too because they are low cost.
But if I were going to do it again, I would get one blend and a few cobs, and focus on getting the smoking technique down first before worrying about PAD, TAD, or any of the other complexities of the hobby.