You can download the FSX Demo to test the mechanics, a few aircraft, and two Caribbean missions.
Microsoft Flight Simulator (2020) - Free download and play on Windows microsoft-flight-simulator-x-free-download
DirectX 9 compatible video card with 256 MB+ VRAM. If you’d like to move forward, I can help you: Find the best add-ons (planes, airports) for the free demo. Compare FSX vs. MSFS 2020 based on your PC's hardware. Step-by-step setup for the free FlightGear alternative. You can download the FSX Demo to test