There are plenty of errors in your paragraph. A person who didn't know English would have a difficult time understanding what you wrote. Don't dismay, though. All the pieces will fit providing you take the time and the effort.
You've tried hard to use accents correctly, but the very first mistake you made was before the first word. There's an 'Accents' pull-down menu just above the input box for typing text. All the special characters you need to write in Spanish can be found in that menu, including the upside-down exclamation point.
By the way,
mi doesn't have an accent when it means 'my'. It does when it means 'me', used as an object to a preposition.
"Is there anything else ..." (Hay algo más ...)
¿Qué más debo hacer en vez de memorizar vocabulario?
Además de aumentar el vocabulario, ¿hay algo más que debo hacer?
"Please correct any mistakes I made."
Por favor, corrige cualquier error que haya cometido.
Corrige los errores, por favor.
Easier to say.