How do I decide which company to choose for my TEFL Certification?

If anyone can provide any advice or suggestions, I’d greatly appreciate it. Ultimately, I would like to teach English abroad in South Korea to children but I’m also open to teaching in China, Vietnam, and Thailand to any age group. I would prefer to take the TEFL course in the states or on-site and teach abroad right after. Currently, I’m looking at International TEFL Academy and Bridge TEFL. I would also like to know are there are personal loans/scholarships/grants that help to fund the cost of a TEFL certification? Thanks!