This!
Also, another tip is to build stamina. I think you are already doing this, but strumming in time over a full song is harder than doing it over a handful of bars (at least to start with).
I mention this mainly for other people who might be reading this, because I have come across people who think that being able to hold down a chord and strum it for a few bars means they know it.
Being able to strum, and keep up with the chord changes, across a whole song is when you know it.
I think you know this and are putting it into practice, but, as I said, others may be reading this and may not have considered it.
It’s why the mantra around here is “learn songs”.
Cheers,
Keith