You don't ever want to get by the burn...you'll be dead
I recommend working on o2 tables for a couple weeks, then throw in some co2 tables.
Here's what i started with when i was new:
Monday: o2 tables
tuesday: o2 tables
wednesday: co2 tables
thursday: o2 tables
Friday: co2 tables
Sat and sunday rest.
If you don't know where they are, look up the sticky in the beginning freediving forum near the top of the forum.
