Hello 
I am new with Zbrush (again one :P), I began last week, so, I am not very good for the moment.
I am creating an astronaut for my 3D game running with UE4.
This is what I already made 

I have several questions for you 
- I think I have divide my tool when the body was hidden… because the head is really more divided than the body and the arms… if you have any idea for me, to help me to have something better

- the topology arround the collar is horrifying
I tryied to retopology it, using ZRemesher but it retopology all my tool…
- The character has toes… what is the best method in order to delete them to create boots ?
- Last thing
(sorry x) ), my first subdivision level is arround 12k poly, is it good ? I mean, is it a good technique to create several subdivion levels like that for a game ?
Sorry for all that questions, and I also apologize for any english mistakes.
Thank you a lot, see you 