really simple deck you can do everything with 2 cards if you got a nice hand, otherwise 3 are cool,
you summon to the oposite side of the field you gonna link summon(you special summon to the right if you are gonna link summon on the left and so on)
first step is to summon someone, in preference someone that doesnt have an effect to special summon itself, then summon all the monster you can from you hand
now to link summon Marincess Blue Slug , using her effect get a monster back from the grave to the hand using her effect(if theres a choice choose someone who can special summon itself), the ideal is Marincess Pascalus that goes into Marincess Blue Tang which link summons into Marincess Blue Slug , Marincess Blue Tang effect sends someone like Marincess Mandarin , Marincess Sea Horse or Marincess Sleepy Maiden to the grave which Marincess Blue Slug can rescue, aditionally blue tangs effect when its used as link summon lets look at top 3 cards from deck and get another marincess card.
if you dont have another monster on the field its time to special summon someone else, link summon Marincess Sea Angel bellow Marincess Blue Slug and get either Marincess Battle Ocean or Marincess Dive if you already got field spell on hand and vice versa.
use the recued from grave monster or other you had in hand, to special summon into Marincess Sea Angel pointer or other free spot on the field(preferable), use Marincess Sea Angel and new monster to make Marincess Coral Anemone and use her effect to summon a monster from grave(just select anything),
you can also change moray of greed by foolish burial if you want, also works and you wont get lucky with it every time,
then use that monster and blue slug to make Marincess Crystal Heart, then activate field spell(yes only now because its annoying otherwise)
Time for our boss monster, use Marincess Crystal Heart and Marincess Coral Anemone to make Marincess Aqua Argonaut , then use field spell to attach 3 links to her so she can use her effects.
with this you are pretty much done, set any traps u have except if they are marincess hand traps like Marincess Wave , and thats it
with the field spell on aqua argonaut wont be affected by opponent effects, she also can deny one spell/trap card that helps the enemy or destroys the field spell, theres also Sea Stealth II which sadly is a better alternative than this whole combo, so ya
the best outcome is you have a really good hand and you can aditionally summon Marincess Coral Triangle to add one marincess hand trap to hand.
good luck, this is my first link deck that i upgraded after new marincess cards came out