It's way too early to be spending Crowns on race changes, we don't know the final launch notes yet and we've not seen how the meta will unfold on live.
Personally I wouldn't if your such a low level. Lvl 1 to 35 can be achieved in a day with exp scrolls and dolmen grinding. Occasionally the race change tokens go on sale for half price too.
This PTS cycle, we can finally gift literally all items in store (including even monster bites and bag upgrades, and of course all service tokens). Previous time, except cosmetics and Race change toke
I probably used at least 5 race change tokens over time to correct the mistakes I made when creating the characters as a noob and I guess now they expect me to pay again after they will blow up racial