Legacy of the Duelist Gravekeeper deck (again on English)

Hey, I am currently playing Legacy of the Duelist very often and I noticed how strong the Gravekeeper deck is.

I am not very good at Yu-Gi-Oh and I honestly don’t know enough about it. I know how to use cards, how to summon them, and how tribute summoning works. But for example, I don’t know how to use the Extra Deck or the Side Deck.

I also have the feeling that my deck is incomplete. I often play against a friend of mine and I notice that my cards themselves are not bad, but I don’t have anything with high ATK and DEF values, or even a really good effect.

Could you maybe help me and tell me what I should put into my deck, no matter if it’s a trap card or anything else? Maybe you could also tell me where I can get all these cards for a Gravekeeper deck.

Thanks in advance for the help <3