Q1: If I use this card's Main effect to suspend an opponent's Digimon, can I then unsuspend 1 of my Digimon?
Yes, you can. The part of the effect after "then" will activate regardless of which player's Digimon you unsuspended.
Anemoi Embrace ST18-15 U LIBERATOR [Main] Suspend 1 Digimon. If this effect suspended your Digimon, return 1 of your opponent's suspended Digimon to the bottom of the deck. Then, unsuspend 1 Digimon. --- [Security] Return 1 of your opponent's suspended Digimon to the bottom of the deck.
Anemoi Embrace ST18-15 U LIBERATOR [Main] Suspend 1 Digimon. If this effect suspended your Digimon, return 1 of your opponent's suspended Digimon to the bottom of the deck. Then, unsuspend 1 Digimon. --- [Security] Return 1 of your opponent's suspended Digimon to the bottom of the deck.
Anemoi Embrace ST18-15 U LIBERATOR [Main] Suspend 1 Digimon. If this effect suspended your Digimon, return 1 of your opponent's suspended Digimon to the bottom of the deck. Then, unsuspend 1 Digimon. --- [Security] Return 1 of your opponent's suspended Digimon to the bottom of the deck.
アネモイエンブレイス ST18-15 U リベレイター 【メイン】デジモン1体をレストさせる。この効果で自分のデジモンがレストしたなら、レスト状態の相手のデジモン1体をデッキの下に戻す。その後、デジモン1体をアクティブにする。 --- 【セキュリティ】レスト状態の相手のデジモン1体をデッキの下に戻す。