~345,000 girls play HS softball (NFHS, 2024)
~86,250 are seniors (25%)

From that...

~8,500 post-HS spots available (colleges and jucos)
~1,600 D1 spots available
~450 Power 4 spots available
~90 spots available in the SEC
~ 7 spots available at Oklahoma

Said another way...

~9% play beyond high school
~1.8% play D1
~0.5% play Power 4
~0.001% play SEC
~0.00008% play at Oklahoma (or pick your #1)