If you feel comfortable with Starter Deck Duel, and have earned a few rare wildcards this list won't be too taxing to craft, and will give you a good way to safely tap creatures on your way to winning some games

Rising Carp Amorphactor Pain, the Imagination Dracoverlord Drytron Meteonis Draconids Drytron Meteonis Quadrantis Herald of Perfection Herald of Ultimateness Megalith Phul Nekroz of Areadbhair Nekroz of Brionac Nekroz of Catastor Nekroz of Clausolas Nekroz of Decisive Armor Nekroz of Sophia Nekroz of Trishula Nekroz of Unicore Nekroz of Valkyrus White Knight of Dogmatika White Relic of Dogmatika Adamancipator Risen Dragite Adamancipator Risen Raptite Aromaseraphy Sweet Marjoram Baronne de Fleur Baxia, Brightness of the Yang Zing Buster Dragon Chaos Ruler, the Chaotic Magical Dragon Coral Dragon Crystron Phoenix Crystron Quariongandrax Denglong, First of the Yang Zing Draco Berserker of the Tenyi Dragunity Knight Areadbhair Dragunity Knight Ascalon Dragunity Knight Barcha Dragunity Knight Gae Dearg F.A
All Level 3 or lower Sea Serpent-Type monsters you control can attack your opponent directly
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The original Base Set introduced 102 cards, including the now-legendary holographic Charizard that has become synonymous with valuable Pokemon cards
This is something that I belive cannot be determined purely based on the data of the cards