Need advice on using a VST with Yamaha P-45 — do I need an audio interface?

Hi everyone,

I recently bought a Yamaha P-45, but I'm not really happy with its piano sound. I'm thinking about using a piano VST to get a better sound.

My question is: Do I need to buy an audio interface to reduce latency, or can I simply connect the P-45 to my PC via USB, run the VST on the PC, and connect my PC directly to speakers?

I'm mainly concerned about latency and getting a good-quality piano sound.

Would appreciate any advice on the best setup, especially if I can avoid buying an audio interface unnecessarily. Thanks!