There’s some personal choice here because what works for one person isn’t always the same for others but I would start with a beginners Oracle deck.
There is a really good thread on Tarot vs Oracle specifically for beginners, but I am firmly in the camp that if you want to start seeing real results from your readings early on, then you should start with one of these decks.
They’re still serious and viable for your entire time with the cards, but they will work easily and early on.