[review request] 18k vs 15k, center-oriented opponent

Lost due to timeout, but I think I was losing anyway. I didn’t know how to react to what my opponent (white) was showing me, so I tried a big invasion to reduce their territory. I thought it went well, but the AI score estimate shows a big loss for black until the end game. What would a better response be?

I’m sure I’ll face more players who play unorthodox openings; what principles can I fall back on? And if there are any major tactical issues you see, I would be grateful if you could point them out.

Thanks in advance.

Ok left a review left some notes on it

I reviewed your game @spardaka

Thank you both!