How good are the Study.com TECEP prep courses?

[Merlin]

I'm planning to take a TECEP at some point soon to finalize my enrollment with TESU. Though I may end up taking additional ones later.

Since I'm a BSBA student, I'm looking at starting with COM-210-TC (Public Relations) since it looks fairly straightforward and fits into the marketing area, though I might want to do FIN-331-TC (Financial Institutions & Markets) first since I need 3 UL finance area credits too.

I probably have somewhere in the 20-40% familiarity with these two topics from my own business experience. However, through hands-on experience and not academic so it doesn't always translate well to an exam. So, I'll need to find good study materials whichever way I go.

It looks like Study.com has prep courses for both of these exams, but I'm wondering how good their TECEP prep courses are, and whether one can aim for a passing grade on the TECEP only using those courses as the basis. I'd prefer not to have to purchase textbooks if possible, but I will if needs be. Though I'm terrible about reading textbooks and getting anything useful from them (since they are presented in such a boring way, and usually cover a ton of unnecessary extra material). I don't want to spend two weeks reading a textbook if I can avoid it. Which is why I like online options like Study.com over B&M. I prefer more focused instruction when I can find it.

I'm wondering what other's experience are using the Study.com prep materials for TECEPs, and/or general advice on taking them (or on the two specific courses I mentioned.)

Thanks!