Soldato
If that DAC has ASIO drivers then maybe it'll work as a decent enough audio interface with low-ish latency. But you'll be far better off sticking to a dedicated audio interface that's geared towards music production plus you have i/o options.
Personally if money is tight to begin with then worry about the interface and your headphones/monitors. A cheap DAW will suffice for time being and you can change when money allows. Likewise with a midi interface/"set of keys", most DAWs have a midi-roll and/or allow you to use your keyboard so i wouldn't worry about purchasing that at this point nor other outboard gear.
And remember, second-hand is always an option so get looking through eBay/Gumtree/FB Marketplace etc.
Out of interest what Mac are you using and what's your rough budget?
Personally if money is tight to begin with then worry about the interface and your headphones/monitors. A cheap DAW will suffice for time being and you can change when money allows. Likewise with a midi interface/"set of keys", most DAWs have a midi-roll and/or allow you to use your keyboard so i wouldn't worry about purchasing that at this point nor other outboard gear.
And remember, second-hand is always an option so get looking through eBay/Gumtree/FB Marketplace etc.
Out of interest what Mac are you using and what's your rough budget?