I think a helpful thing for novice gardeners should be more about planning the garden over the year. The equivalent to batch cooking perhaps.
It’s likely to be a smaller garden if it’s your first one and I know from experience that it’s really easy to buy what’s available when you move in, stick it in the ground and then do the same two months later when the first lot go over. And repeat. You end up with lots of random stuff that looks messy if it even survives. So you buy more and so it goes on.
And useful rules like having more hard landscaping than you think, having trees, (even quite big trees can be put in pots) and neatly edged lawns makes pretty much all gardens look better.
Growing seeds is actually quite challenging unless you have space to do it properly. Certainly not cost effective in terms of results to buying or getting given plants from sales/ fetes or friends.