Q1: If the Main effect of this card rests opponent's Digimon, can I then activate one of my Digimon?
Yes, it is possible. Regardless of which player's Digimon is rested, either yours or opponent's, the effect after "after" will be performed.
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。