You can see a reasonable amount of the interior, but I agree that the amount of effort needed usually is a bit out of proportion to the added effect on the model. FWIW, here’s an impression what you can see on a MiniArt M3 (but with Takom markings) with absolutely all of the hatches open:
Which is why I left the turret and engine deck loose:
In practice you can see more than photos show, because with the real model you can move your head around and look deeper into the interior, but still, I don’t think I would do this again unless I had a good reason to want to show off the insides of the tank.
As for your MiniArt tracks, they will be much easier to assemble if you make yourself a simple jig:
I first assembled a couple of links the way MiniArt tells you to, but found that difficult. The jig is just four bits of wood: the two on the sides are far enough apart that the length of tracks sits nicely between them, with the strips against the sides of the track without being tight.
What I do is place three “inside” blocks (part Eg1, the side with the raised bit in the middle) against each other in the jig, drop in four end connectors onto them, apply a small bit of Tamiya extra thin cement to the middle of the middle block, then put on an outside block (Eh1) and firmly push it in place. Then add another Eg1 to one side, put on two more end connectors, add a drop of glue and an Eh1, repeat.
Doing it this way instead of assembling the track with the teeth pointing up makes it much easier, because you don’t have to drop a part Eg1 between the end connectors without pushing them away.
Added tip: write 1, 2, 3 etc. with a pencil on the tenth, twentieth, thirtieth etc. block so you don’t need to keep re-counting how far you’ve gotten 