First off, I have no experience with the suggested Varycon filter set. Also I can't make up whether you've just seen the filters for sale or whether you've already purchased them.
If already purchased, just give them a go!
If not: My suggestion is just start with what you find reasonable and affordable, whatever that may be. Experience will tell if it was the right call.
The Ilford filter set will currently cost you
about GBP / US$ 33, which is a reasonable price for what you get with the full and half grades.
Personally I would go and buy either that set, or possibly the
cheaper Foma filter set, which has all the full grades, but requires a little more work when switching grades.
I would stick with either of these, because they are both intended for use with currently available VC papers.
There's a lot to learn already when starting out in the darkroom so you want to introduce as few unpredictable variables as possible.
To me that means fresh paper, fresh developer for every session, and a decent set of filters. Later on, when you get some experience, you can start adjusting the variables one by one like re-using developer a few times or using older paper.
You'll learn soon enough. But when starting out with too many variables, you'll keep asking yourself why your prints look all muddy and why you can't reach full whites or blacks. And then either all the fun is lost, or you end up buying the better gear anyway.
I started messing around with blue and green filter gels that are intended for stage lighting (because I already had them lying around), and even though they work pretty well for split grade printing, I still ended up ordering a dedicated filter set because I wanted predictable behavior.
Like I said before, I currently use the Foma filters and they work perfectly fine, but I'll probably pick up the Ilford filters later on anyway, simply because they are much more convenient when switching grades.