I got it to work but I have to say, the instructions were a bit confusing. SL4A doesn't come with Tasker, I had to download it from the link since it's not on the Play Store either. Once I have SL4A installed, I opened it, and installed Python, I had to open Python and click on the install button. It downloaded and extracted some files, IDK what they were. Then I set up the email client on my phone and linked it to my Google account (I'm not sure it that was necessary or if the Gmail app would have been enough).
After I did all that it still didn't work. I went into Tasker and opened the Task and pressed the play button, I got a "EMAIL_USER missing". I had to edit this:
+ Script > Run SL4A Script > Name (Search icon) sendemailA.py > Pass variables "%EMAIL_TO,%EMAIL_ATTACH,%EMAIL_SUBJECT"
into this:
+ Script > Run SL4A Script > Name (Search icon) sendemailA.py > Pass variables "%EMAIL_USER,%EMAIL_PSWD, %EMAIL_TO,%EMAIL_ATTACH,%EMAIL_SUBJECT"
And that worked.