Skills day will certainly help and take the guess work out of it so you know what you are trying to achieve, how to correctly make it happen and you can work on a consistent technique.
Even as a wheels on the ground rider, there is a good chance that you’ll be able to do short ones that will get you over a pot hole or branch on the ground. Which is really all you need for everyday riding. For sure you won’t be manualling for 10m, that stuff takes a LOT of time and dedicated practice.
I can proficiently do very short ones and I find it really benefited my riding. I am able to navigate up and over obstacles much smoother and efficiently than before, maintaining my flow and speed round the trails.
By all means watch a few how to videos and spend some hours in the park practicing. But I found having an experienced teacher telling me how to do and looking at my technique meant I was able to achieve it quicker and with high consistency. I’m of the opinion that bike skills tuition is expensive but well worth it and value for money as I gain a lot from it.