capitalizing words in list

[Truman]

# [ ] split the sentence, code_tip, into a words list
# [ ] print the joined words in the list with no spaces in-between
# [ ] Bonus: capitalize each word in the list before .join()
code_tip ="Read code aloud or explain the code step by step to a peer"

my code:

code_tip = "Work hard and believe in yourself."
wl = code_tip.split()
print(''.join(wl))

Don't know how to capitalize each word in the list before .join(). I tried with .str() but it gives error: AttributeError: 'list' object has no attribute 'str'