That will definitely make beer!
I think you may be a little light on your hops & IBU for and american IPA, but that is personal preference. You could add another 30 or 60 g at the dry hop. Either Citra or Chinook would work as the additions there. But using a single hop will teach you how the different hops taste. Next time brew with a different one. Then start mixing them when you figure our which ones you like. Look up SMASH recipes and the thoughts behind them (not now, after you brew this).
You can use table sugar to prime if you don't want to buy the dextrose, that bag will last you forever. Priming the bottles is fine, just takes longer. Do you have enough of them?
Make sure that crystal is milled and make sure you have a bag to steep it in.
Don't make a smaller batch. You are going through the same amount of work so you may as well enjoy it at the end.

But given your space and interest, you should check out the One Gallon Brewers threads.
GL!