I'm currently halfway through an online CELTA. It's a bloody nightmare, much harder than I thought it would be. We're teaching students online which is much harder than I expected, some are in Myanmar on a mobile phone with dodgy Internet. I get that this method of teaching would be fine once you're qualified but to train in these conditions when you're being assessed is very stressful. I'm really struggling with the technical knowledge of grammar and the pace.
I'm up at 6.00am preping, class 9-5.30 and then a few hours in the evening, 3 days a week. The other 2 days and weekends I'm studying. I'm not alone, this is the same for the other teacher.
If you decide to do it clear your diary for the duration of the course, prepare and freeze meals and study, study, study grammar. I wish I'd waited and done a classroom based course, it's difficult trying to teach material you're not familiar with and manage zoom. It feels a bit like learning to drive in an articulated lorry instead of a small car.
I did a PGCE 2.5 years ago then moved to SE Asia. I also have a 1st class honours degree and I am struggling with the pace. I expected because English is my first language, that would help but the SE Asian student teachers have a better understanding of English grammar, it's just the way they are taught.
Our tutors are in the States and Europe. I can see them becoming fatigued too and they are starting to drop sessions and trying to have them on other days outwith the timetable.
If you decide to do it, don't do it online and don't do the intensive 4 week course. CELTA is the gold standard and the certificate will open doors, I'm still not convinced about the teaching methods.
However everyone who passes rave about it and says do it. Maybe it's a bit like childbirth, you forget how hard it was.