

Q1: Can I change the attack target of a Digimon that isn't affected by effects with an effect that "changes the attack target"?
Yes, you can.
Q2: Can I activate this card's inherited effect while I don't have a Glowing Dawn trait Digimon and trash a card under one of my Tamers?
Yes, you can.
Lv.2 Kyaromon BT26-003 C In-Training | Lesser/Glowing Dawn/BEATBREAK --- [Opponent's Turn] [Once Per Turn] When one of your opponent's Digimon attacks, by trashing the bottom face-down card from under any of your Tamers, change the attack target to 1 of your [Glowing Dawn] trait Digimon.
Lv.2 Kyaromon BT26-003 C In-Training | Lesser/Glowing Dawn/BEATBREAK - --- [Opponent's Turn] [Once Per Turn] When one of your opponent's Digimon attacks, by trashing the bottom face-down card from under any of your Tamers, change the attack target to 1 of your [Glowing Dawn] trait Digimon.
Lv.2 Kyaromon BT26-003 C in-training | Lesser/Glowing Dawn/BEATBREAK --- [Opponent's Turn] [Once Per Turn] When one of your opponent's Digimon attacks, by trashing the bottom face-down card from under any of your Tamers, change the attack target to 1 of your [Glowing Dawn] trait Digimon.
Lv.2 キャロモン BT26-003 C 幼年期 | レッサー型/グローイングドーン/ビートブレイク --- 【相手のターン】[ターン1回]相手のデジモンがアタックしたとき、自分のテイマーの下にある裏向きのカードを下から1枚破棄することで、アタックの対象を特徴「グローイングドーン」を持つ自分のデジモン1体に変更する。