You can use http://www.learnkey.com
The A+ course: http://www.learnkey.com/aplus2016_series
It is taught by a senior instructor in an online self-paced video format. You can also listen to an audio version during your spare time so that it all sinks in through repetition. And absolutely everything you need to know is covered.
You can also look through my study resources Reddit thread here for ideas: https://reddit.app.link/JoQuThMpMQ
This is an expensive option ($670), but may be worth your while to check out.
LearnKey does an excellent job of thoroughly teaching material.
Here is the link: http://www.learnkey.com/Securityplus2017