Using other punctuation

I am learning when to use other punctuation

e.g. comma, exclamation mark, question mark, apostrophe

Guess what I did on the weekend? I went to the beach on Saturday! We didn't pick up shells. 
I was happy!

I am proud of myself because I know how to use question marks, exclamation marks and apostrophes. I know that i need to improve on remembering where to put speech marks and commas.