New player looking for advice...

Hi everyone

It’s my first time playing Hearthstone, and I recently saw that a new expansion is coming out in about a month. Right now I’m using the free Paladin deck you get after completing the tutorials. I currently have around 2,900 crafting resources and 1,000 gold.

My question is whether I should wait for the new expansion before crafting a deck and buying packs, or if it’s worth building something now that will still be useful once the expansion releases.

I’d really appreciate any advice. Thank you so much!