For those that have done/are doing this: How do you manage a full time job and studying for a new cert?

As the title implies, I find myself really struggling with studying and working at the same time. I just recently took my first IT related job, and as I'm sure many/most of you can attest I'm really having to teach myself mostly everything. The "training" I get is very vague, if I receive any training at all. So between learning my new job and studying for my CCNA I seem to be having a hard time making any of the material I study stick.

I have the pie in the sky dreams of building my own homelab and practicing and learning on my own...but I just can't see when I'll have the time to do it.

Any advice and tips are welcome, even if it's "grit your teeth and bear it, we've all been there before."

Thanks in advance to anyone that responds constructively, you are appreciated immensely.

Edit: phrasing.