How do I manage good chest development without a gym?

I’m (38M) about 6 months into my fitness journey. Going to the gym is not really in play for me at my current stage of life with my 3 kids (although I hope I can change that in a year). For now as a beginner, how can I build my chest when I’m limited to pushups and a set of 5-25lb dumbbells? I feel like I’ve plateaued. By my searches I’ve seen either more reps per set or more sets in total. I thought I’d search for some personal experiences. Any tips or insights are appreciated. Thanks in advance.

Currently doing incline DB bench, 25lbs 3x10-12 and DB chest flys, 15 lbs 3 x10-12. Pushups are 1 set to failure (about 18-20).