I see a few things to point out. There are probably other tweaks as well but for right now it would be good for you to get used to the exercises and handling heavier weight.
What are "assisted pullups"? Are those the ones where you use the floor to help you? I'd say nix that idea. Don't look at it as getting all the reps in. Now is as good a time as any to improve your strength. Regular pullups will do more for you...put them FIRST. It doesn't matter if you can't get all the reps. You don't have to do 3X8 anyway. You could do 4x6 or something else. Even if you only get two or three that's fine. Next time you'll get more.
Same goes, imo, for anything involving bodyweight. I would drop the seated rows for a barbell row.