What if I cannot remember to take my temperature, track my cycle, or check my mucus every day?

This method only works if you are dedicated to using them correctly and consistently. There are lots of tools such as apps, thermometers, and cycle beads that can help with cycle tracking.
Still not working? If you are not sure you can monitor your fertility signs every single day, think about another method that requires less effort.
An IUD or the implant is good for years, the shot lasts for months, the ring only gets changed monthly, and you change the patch once a week.
Try a different method: implant, IUD, patch, ring and injectable.