I would pick an inexpensive deck that you are interested in, make a few substitutes for the cards you don't have and gradually swap in the real cards as you can afford. Once you have that deck you can start focusing on the next one that interests you. I wouldn't just focus on specific cards without an overall strategy.
Patches the Pirate. This guy is such a powerhouse and fits many decks. I don't have him and it immediately makes your curve much weaker, But, if you prefer control - there are other options. Still, control decks are usually expensive.
Looks like you have pretty much all the cards you would need to make any one of the many midrange Hunter decks here. I would save most of your dust and go that route. After you start winning and get more gold for packs, then you can start crafting a certain direction. GL
I would make sure that whatever you begin to craft is from the classic set. Other sets rotate out, but classic will usually stay in standard. Second, I would recommend crafting neutrals first, due to the fact they can go in any deck, which makes deck building more versatile. The recommendations by XzXGames are very good, but I would also include Leeroy Jenkins to the list.
I woud simply suggest that you save your dust to craft cards way later when you have a basic set to work with. The main reason is to avoid creating cards you'll get duplicates of while getting packs. So start playing with whatever you get, let it build up some then consider starting to craft some staples you didn't get. It'll seem slower at first but you'll end up with a better collection faster that way.
Check up current meta midrange hunter list, cost around 1k dust to craft and it's mainly made off classic cards but tbh you should look up for different card game to start as a f2p, hearthstone is bitch in this case
As far as classic standard cards go these cards almost always find a home in decks depending what the meta is. Most of these are good for control too if that is what you prefer playing. Another good way to get an idea of cards played at the moment is to watch some streamers and look at the variety of decks they play and how they alter them and their card choices. Hope this helps!