As a player, now you can choose up to 2 levels. All points will be accounted separately for each level.
If you choose two levels (for example, Open and Amateur), you will appear in 2 separate rankings (Open and Amateur) at the same time. So you will be able to send or accept challenges with players from these two levels.
P.S. We will keep you updated here, in posts like this one, about new features of Liga.Tennis.