4 rods for trolling seems too much at your stage in the game. Even though you are allowed 2 rods down there on the river doesn’t mean you should be using 2. If you don’t know what you are doing it will be just a jumbled mess trying to keep em going. Fish one and figure that out then move to 2, unless you multi-task well, which by my wifes opinion men are incapable of
With that said id recommend a line counter combo, can long line and bottom bounce, will it be perfect for both styles, no, but its a good starting point.
Then a 7′-7’6″ M-MH baitcaster combo with 10lb mono or braid equivalent, this rod will be able to troll and bounce as well, while serving double duty for bass and northerns. That way when you do become more efficient at trolling you can run 2 rods. Or if that style of fishing becomes effective for you then pick up another line counter and the baitcaster becomes strictly bass/northern.
A M and a ML jig rod should handle most river fishing, whether pitching, dragging, live bait rigs, casting cranks to dams, etc. etc. I really like x-fast tips for river on both rods, but not necessary, just feel hooksets are faster and handles current better.
If you start trolling the river that means you will need cranks, and lots of em. If you aren’t ticking bottom you don’t know where your lure is, and ticking bottom equals LOTS of lost expensive cranks. This is where the big box stores come into play for me, they always have clearance racks and go find yourself all the discounted cranks you can, even if colors aren’t ideal, it is about figuring out the technique, more than the catching, I consider fish a bonus when learning something new.
The more you fish in different styles with starter combos, the more you will be able to answer your own questions on gear. You will start figuring out where you might want a heavier rod, a lighter one, a longer, leadcore, braid, mono, etc. etc. The fine tuning comes only when you start figuring it out, so start basic and progress from there. Don’t forget to post some fish pics along the way!!