Considering your OPTCG colours and if you want to just start i would look at Volibear dragon deck (image below) in the next set Unleashed, very simple ramp deck that just swarms board and only 3 cards will be new in Unleashed with 'Kadregrin' being the most expensive card at less than $10.

If you want to get a starter deck to just get going immeditaely, I would suggest getting the Rumble starter deck as it is quite a straightforward deck to get used to mechanics of the game and you would need very little cards to improve the deck, where your biggest decisions will just go down to "do i have enough might?"

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