If you want to say "some of my friends are girls" then: Algunos de mis amigos son chicas.
We always use feminine pronouns (pronombres femeninos) for feminine nouns (sustanitvos femeninos).
You have to say "algunas de mis amigas"
It depends on what you want to say...
If its to indicate something they do then say: "de todos mis amigos, algunas de las chicas [add verb here]. Meaning: From all my friends, some of the girls [verb].
If you need more help, don't be afraid to ask me! ^^ Spanish is my native language
~Hope this helps~ ^-^
Well, I can't completely help, but I do know some tricks.
For example, write it out fully in English, or the best language you have fluently, then put the whole essay into a translator. Next, make a new document, and copy and paste the translated version into it. Read it out many times, get some quick help (I know some podcasts that can help you learn Spanish easier, like Duolingo) and, once you have learned a bit more (another trick is to read through it using the translator, and see some of the translation parts to learn more Spanish from words that you used) filter out any kinks, and turn it in! It seems harder written out than it is, but it's an efficient way!
Doctor, no me siento bien. Creo que estoy enfermo.
(Doctor, I'm not feeling well. I think I'm sick)
