My best piece of advice is to find the deck or style you like, and then pick up all of the core pieces and staples for it
White is a great color to play with in Commander, and its only getting better
[19] Set: Azurite Sea Rarity: Enchanted This playful version of Alice from Alice in Wonderland has holographic art of Alice stuck inside a house
I just love how big of a payoff you get
These cards were: Aurelia, the Law Above Lazav, Wearer of Faces Niv-Mizzet, Guildpact Rakdos, Patron of Chaos Teysa, Opulent Oligarch Trostani, Three Whispers Vannifar, Evolved Enigma Ravnica Remastered Ravnica Remastered was one of the sets with the most serialized cards available, with a whopping 64 cards available in XXX:500 versions
There are some disadvantages though: Your white commander limits your color identity, and it costs 6 mana to get into play