Notes & Combos
If I could I'd add Reptilianne to the archetypes of the deck because they're sometimes the MVP.
This is a go-second deck, hence the 8 board-breakers and 0 hand-traps. The idea is that through Reptilianne Hydra and/or Ogdoabyss you can clear most boards and OTK pretty easily from there.
In an ideal world, you can use Haggard banishing a 0 atk, Lamia and finally Echidna to tutor 3 reptiles, and then pop all 3 monsters and draw 3 with Hydra (which you are guaranteed to summon if Echidna's search went through).
Ammonite is good to add with Echidna because you can go into Zer'oll right after, which adds Recombination Device, which foolish Stealthbuster and places A-Counters. Then you can use Zer'oll effect to extra-norm Ammonite and get into Gol'gar which is an extra pop.
The Raika package is small but handy, Bloom adds a nice ATK boost, Armored Lizard's bounce can help force a negate, and Selene Snapper takes care of the backrow. If you use Odgoabyss to clear the board the Raikas will either come back or stay because you reborned them.
Replays
Against Snake-Eyes: https://youtu.be/uAnzQHP0tpg
Against Yubel Spright: https://youtu.be/HUeZ4mK-NAM
Against Centur-Ion Bystials: https://youtu.be/Aq_qYxyMnyc

I tried making alien ragnaraika work and couldn't, so absolute salutes to you sir for cooking this

Thank you! To be fair the Alien package is pretty small, but sadly none of the others are good enough to make the cut. But this is still more than most "Alien" lists that only play Zer'oll and the trap to lock people going 1st. Also worth noting that I.A.S. -Invasive Alien Species- is great, as long as your opponent has a field spell, in a BO3 format he's a great sideboard card.

Now time to spend a week doing testing and learning how to play this deck Any tips u have to start to learn this

If you haven't already I'd recommend watching the replays to see how I broke some boards with the deck! But overall, the main thing to try and do is summon King of the Feral Imps, search for Reptilianne Lamia, use her effect, then either go into Reptilianne Echidna, or if your opponent has 3 monsters and you have a 0 atk in the GY you can go into Haggard Lizardose before, use its effect banishing a 0 atk, then finally Echidna. You'll be able to search 3 reptiles and go from there. Ideally searching for Reptilianne Coatl to make Reptilianne Hydra, which will pop the 0 atk monsters on your opponent's field and draw you 3 cards if all went well. There's also a couple of notes in the deck's description, but feel free to ask more precise questions if needed!