How is my sleep schedule (teen)?

Schoolwork is building up exponentially for me, and one three hour nap is making me crash and burn. I've been thinking about dividing my sleep into two, and now that I've looked at various websites it seems that going biphasic is the best option for teens. So I've thought of a sleep schedule, could anyone check it out? Thanks!

7:30-10:30pm: core sleep for sws 4:30-6:00am: sleep for rem

Also, should I try a 20 min nap around 5? I know everyone says teens need to sleep but honestly this would be a lot more than what I regularly do. I guess I'll sleep a ton on weekends to make up for it.