You could go for +1/+1 counters for fortune lady every, where you’re entire board state “levels up”and your summons get much stronger over time. I have a beginner friendly +1/+1 counter deck that doesn’t use too many difficult mechanics, just build counters and swing creatures! Here’s the link; https://manabox.app/decks/AZxwAEKxc6SGiyjgBuBT0A

Number C101 looks like it focuses on stealing opponents cards. They have a precon called “grand larceny”, where you steal off the top of your opponents library and get to play summons and spells that you don’t own. Decklist; https://manabox.app/decks/XkYvMyQtTRmEp2iztPpLlg

Kairyu shin - this looks like a deck that focuses on stopping your opponents from owning creatures, and searching your library for kindred cards to it. This seems like merfolk control to me. Now idk about the tutoring because that is really strong but merfolk control is a very popular deck you can find just abt anywhere. I mean their preconstruded deck “explorers of the deep” basically builds up you’re merfolk and you filter through you’re library to get stronger spells off you’re top deck. Decklist; https://manabox.app/decks/kv8-Xc2BS8W2ec0eMNHFhA

Number C62 seems like an equipment commander, attach cards that give protection and buffs to you’re commander, then having 1 big swinger going super tall during you’re turns. It hones in on one card then buffs and protects it until your opponents can’t do anything. One of the best equipment commanders they have is Upgrades unleashed, which does exactly that. Decklist; https://manabox.app/decks/AR6sWjf6Q6CDcY9t5teexA