League Battle Decks?

My brother in law and nephew want to learn how to play the TCG. I'm the resident card game player so they want me to teach them and I am pumped to do so! Only problem is, outside of a couple packs my daughter got to open because she just thinks they're neat, we don't have any cards. I was going to look into building a Dragapult deck since it's one of my favorite Pokemon, and noticed that it is going to be featured in an upcoming precon. How are these decks for battling each other? It looks like there was recently a Charizard one as well which is one of my nephews favorite mons so I was thinking we could get the two and have fun kitchen table battles. I don't think there is any real concern with standard rotation or meta since he doesn't even know what those mean, and my brother in law just wants to be able to play with and bond with his kid over a game he enjoys. Would you guys recommend this as an entry into casually playing?