One of the keys to success with safelists is being able to write emails that are compelling and get people to open and read them. You cannot just copy and paste the email swipe files that a program gives you and expect a good response.
However, you do not have to take a 6-month course in copywriting to create emails that get readers to take action either. If you want to devote just a couple of hours to learning the basics, and then start practicing what you learn, you can multiply your results quickly.
This isn't rocket science, anyone can get better at writing emails that get results. I recommend that you try a toolkit "Pentafecta" because you can write like a professional copywriter without all the years of practice. Especially if English is your first language.