Is a gtx 1660ti good?

If you can't afford a 2060 is a good option, but I would wait for the new graphics cards to be announced in the next few days. Of course, the 1660 Ti is only recommended if you're only going to play at 1080p and you don't want to have 60FPS stable, because in some games you won't be able to get those results with this graphics card.