The second criterion is having a clear goal. Organizations should clearly say what they do. They should say why inviting volunteers is necessary. Goals could be ending hunger and so on. This can be check on their website. It should have a list of goals. In summary it is possible to find a good volunteer organization.
1) It just sounds bad.
2) It is difficult to join your ideas together
3) Every sentence needs a subject, so you might repeat it too much
Word count of a sentence does NOT include citations
Penguins are bird ("A study on flightless birds of the Antarctic," n.d.)
This sentence is three words, not eleven
News articles have shorter sentences than essays. Dissertation sentences can be much longer. When you write something, find some examples and check what is expected.