They don't try to 'convert' anyone. They try to interest them in religion.
No.
Orthodox Jews rarely accept converts, but if they do, they require several years of intense study.
Symbols do not destinguish Orthodox Jews from other kinds of Jews. Orthodox Jews are distinctive in that they adhere to the idea of the of the binding nature of Jewish law.
No Jews, regardless of level of observation, seek converts. However, if people wish to convert, Orthodox Rabbis will assist them after being convinced that the potential converts are sincere in their actions. That being said, most Orthodox groups, especially Chassidim, try to get non-observant Jews more involved in Judaism.
In South Africa, like most countries aside from the USA and the UK, the Jewish communities are overwhelmingly Orthodox. Whether or not a person who attends an Orthodox Synagogue is Orthodox in his "non-synagogue activities" is purely up to the believer. So, some members of the Orthodox community may not actually be observant Jews and would appear like Reform Jews in the USA. However, they would not call themselves Orthodox, but Jews who happen to belong to an Orthodox synagogue. Actual Orthodox Jews in South Africa would be indistinguishable from Orthodox Jews in the USA.
Hasidic Jews are a subcategory of Orthodox Jews. The majority of Hassidim wear long coats, while most other Orthodox Jews wear regular suits. On Sabbath and festivals, Hassidim wear a fur hat called a streimel, while other Orthodox Jews wear hats more similar to standard styles.
Orthodox Jews don't allow men and women to dance with each other, but all other Jews do. (Orthodox, while separating based on gender, do dance, but only with people of the same gender.)
there is conservitive and reform
Orthodox Jewish men wear the Yarmulke all the time. Other Jews (male and female) decide for themselves whether or not to wear it.
Yes, non-Orthodox Jews can become Orthodox by becoming more observant. Non-Jews can become Orthodox Jews through Orthodox conversion.
Orthodox Jews are strictly observant. Hassidic Jews are even more strict.