If you really want to be a Spanish tour guide (engaged in tourism), you must take a tour guide certificate. It seems a bit difficult, but you can pass the exam by careful review. You'd better train. If you just want to lead a group to accumulate some experience and don't want to develop in the tourism industry, you don't have to take the tour guide card. You don't need a tour guide card to take a group abroad to a Spanish-speaking country.

My Spanish education is also junior college. I have been a tour guide and have taken overseas tour groups.