Snails that come on plants are generally referred to as 'pest' snails. They are often just common pond snails and are harmless. So, again, it is up to you what you want to do.
Options:
1 - Leave them alone. Leaving them alone means that the population may grow if you are an overfeeder, but having more of them means having less rotting food in the tank. They are also good at cleaning algae off the tank, so you won't see algae, just snails. Depends on how much algae you get, how much you over feed how many snails you'd see at any one time,
2 - Remove the snails - manually. This involves dispatching through one way or another the snails. My preferred method has been during a water change to just siphon them out of the tank. You can also pick them out by hand, but my fingers are big and these snails are often very small.
3 - Remove the snails - biologically. Adding snail eating species to your tank. A 64 L tank doesn't allow many fish species to be the snail eaters, so that leaves... other snails. Assassin snails can do a good job of keeping the population low. But, if you are an overfeeder, the assassins might actually prefer eating the extra food, rather than the 'pest' snails.
4 - Remove the snails - chemically. (I do not recommend this, especially as you plan to add shrimp later.) There are plenty of fish safe snail killers (usually the active ingredient includes copper), but this treatment means adding a potential threat to your future shrimp, and I am a person that always errs on the side of not adding unnecessary chemicals to the tank whenever possible.
Personally, I left my snails alone and sucked them out during regular water changes if I saw them. I didn't hunt for them. When I got a bristlenose (BN) pleco, the snails disappeared. Not saying that he ate them, he might have just out competed them for algae (or ate their eggs). A 64L tank is a bit small for a BN.