That flywheel is toast. The damage to the teeth is enough to justify binning it. Gouging/embedded material may have thrown the balance out a bit, but the chewed-up teeth are the clincher.
Stunned Bendix has held up as well as it appears to in images. Be aware that if the teeth on that are damaged there will be issues when it interfaces with the new flywheel. As per previous poster, make sure the Bendix is still OK to use.
I see you are only 18 and this is probably more of a disaster in fiscal terms than it would be to most of us. In future try to be methodical and not rush things (I bet you just figured that out yourself, anyway). We were all young once and doubtless made similar errors (I know I did).
Get yourself a workshop manual, source the required parts and get this behind you. Good luck.