Chess openings e3l. e5

I'm using an opening with white pieces that looks like an caro
kann, but with white ones, the goal is to develop the center with pawns and the queen horse without the bishop of the king of black to nail the horse

1. a3 e5 2. f3 d5 3. e4 dxe4 4. fxe4 Nf6

2. Nc3

   

Another variation:

1. a3 e5 2. f3 d6 3. e4 Nf6 4. Nc3 b6

2. d3 Bb7 6. b4

Or Another:

1. 1. a3 e5 2. f3 d5 3. e4 d4 4. Bc4 Nf6

      

If you find any weaknesses please let me know