You may be able to find a local community college course that offers free/cheap observation or participation in human cadaver dissection.

This 2022 LessWrong post mentions a $60 5-hour option at the Sf Bay Area's Merritt College (in Oakland):

https://www.lesswrong.com/posts/5PBWgHiCiiJHjPRSn/what-it-s-...