Dragging backwards is not the best plan most of the time. Once you get familiar with a tractor, you will know why. Until then, its just words, won't make sense.... No traction, no control, too high a lift.....
In general, there is a safe way to do things, and a whole lot that are not safe.
This is not something we could teach you with a few paragraphs on a web forum.
Go slow, go low, practice on the level, think things through.
Keep the chain you use lower than the rear axle of the tractor. If you hook it higher on the tractor you will get more traction but it will want to pivot the tractor up and over if the log hangs up.
A roll bar and seat belt would add greatly to your safety; but the machines you are looking at are far too old for such.
Yes, and N series is a bit flippy. They had the hitch point in back kinda high.
If you go slow, low, and think, you will do fine. If you are kinda reckless and gotta get done yeaterday and need for speed, well then the safest rig won't really help you out.....