Not trying to be rude, but if you don't understand the freeze precipitation process you probably haven't read enough about this process to be attempting an extraction yet. This is not something to be jumping into if you don't understand what you are doing.
Personally, I don't think you should attempt to extract DMT even if you just know what steps you are "supposed" to do by reading instructions, try to read enough to have a general idea of what the steps are actually doing chemistry wise.
You should also not rush through this process. If you have to rush through it, ESPECIALLY your first time, do it another day. DMT will always be there and this whole venture should be treated with respect. Rushing through it has absolutely no benefits.
Please spend a bit more time familiarizing yourself with this process.
If you have a specific question people would be glad to help you, but if you don't understand the general concepts of the extraction arming yourself with knowledge by reading more on this site is your best bet.