SYN Flood Test Platform

I am a new programmer, i’m learning. I made a SYN Flood program. I observed with Wireshark, i saw how many packets. But I don’t know how many megabytes of attack were. I don’t know how many packages are going to the target in a healthy way. Is there a test platform that you would recommend for SYN Flood(Online/Offline)? I don’t want to attack real sites. I just want to see the damage done by the program.