Draco's gameplan involves accumulation of card advantage over time by making interactions that go net positive with the opponent's cards. The deck is at its most vulenerable during the early turns of the game, and having a functionally 4-5 card hand to start with (depending on turn order) is particularly undesirable. Morganite exacerbates this issue and don't net you positive card advantage until your 3rd turn, and the most pressing concern is making it to that point in the first place.

Fissure also sucks it does nothing going second and we dont want our monsters to get banished

Its the best card in the deck

Use Spell Card "Soul Exchange" instead. it is SR but it very useful.

No you need 3 strike or your just making it harder to go second for yourself

Yes. Maybe because after you end turn. Then you see feather duster or space typhoon. It done your game. You can use Spell Card "Soul Exchange" in additional if you go second.

Read extrav and read disiples and heritage also read erupt

You just have to learn how to sequence your plays correctly

The hardest part of playing TD is resisting the urge to early scoop going second. a board can look untouchable but good ordering a little baiting and a single mistake from your opponent and you're going into turn 4 By then you've got gates up and hopefully repeated searches for spells/traps for off turn removal and combat stuff.

TD also has the problem where it's super easy to over extend and it often just automatically loses you the game All the cards interact with themselves in specific weird ways

You have to learn damage step stuff to play this deck optimally