Q1: With the Your Turn effect of this card, won't all my Digimon with "NSp" in the trait also be blocked by opponent's Digimon with "blocker" which is not affected by Digimon?
Yes, it is not blocked. The Your Turn effect of this card affects all your Digimon with "NSp" in the trait, not opponent's Digimon.
Lv.5 ShogunGekomon EX7-022 U Ultimate | Virus | Amphibian/NSp [Digivolve] Lv.4 w/[NSp] trait: Cost 3 [On Play] 1 of your opponent's Digimon or Tamers can't suspend until the end of their turn. [Your Turn] None of your [NSp] trait Digimon's attack targets can change.
Lv.5 ShogunGekomon EX7-022 U Ultimate | Virus | Amphibian/NSp [Digivolve] Lv.4 w/[NSp] trait: Cost 3 [On Play] 1 of your opponent's Digimon or Tamers can't suspend until the end of their turn. [Your Turn] None of your [NSp] trait Digimon's attack targets can change.
Lv.5 ShogunGekomon EX7-022 U Ultimate | Virus | Amphibian/NSp [Digivolve] Lv.4 w/[NSp] trait: Cost 3 [On Play] 1 of your opponent's Digimon or Tamers can't suspend until the end of their turn. [Your Turn] All of your Digimon with the [NSp] trait trait can't have their attack targets switched.
Lv.5 トノサマゲコモン EX7-022 U 完全体 | ウィルス種 | 両生類型/NSp 特徴に「NSp」を持つLv.4:コスト3 【登場時】相手のターン終了まで、相手のデジモン/テイマー1体はレストできない。 【自分のターン】特徴に「NSp」を持つ自分のデジモン全てはアタックの対象を変更されない。