My first sculpting class

Today I started my clay sculpting classes. I'm studying to work in the videogame industry and this step will help me to better understand better the shapes of the objects and human anatomy. ('better' can also go at the end, "help me to understand the shapes of objects and human anatomy better.")

I'm really motivated by this beginning and the works of sculpture that are waiting for me in these classes.

Obviously, my first clay head is a crap, but all can be improved... like my English!

(or "it is crap" (without the 'a') or "it is a piece of crap" are both fine)

Haha, that's true. Your English is far from crap though. Sounds like fun! :p

My first sculpting class

Today I started my classes of clay sculpting. I'm studying to work in the videogame industry and this step will help me to understand better the shapes of the objects and human anatomy.

I'm really motivated with this beginning and the sculpting works that are waiting for me in these classes.

Obviously, my first clay head is a crap, but all can be improved... like my English!

Today I began my clay sculpting classes. I'm studying this so I can work in the videogame industry as it will help me to better understand the shapes of the objects and human anatomy. 

I'm really motivated with this beginning and am looking forward to the sculpting works that are waiting for me in these classes. 

Obviously, my first clay head was crappy but all that can be improved... like my English!

Well done!  Everyone that corrects your posts will give you slightly different suggestions which just shows you that there is more than one right way to say the same thing. I have changed a few things and added a few extra words to improve how your post sounds and reads and makes it more explanatory.  I hope this helps.  Keep up the excellent work!