First off, welcome to the
SW side!
Second, if you are a beginner in
SW, I would suggest not starting with a tank that small. Level changes, such as salinity, pH, ammonia, so on, are very much more pronounced in a smaller water volume. You really have to stay on top of an aquarium that small.
Next, 2 clowns would be about the limit in that tank. And anemones are not recommended until the tank is more established. A lot say a year, I think at least 6-8 months.
It can be done. Don't get me wrong.
SW is very rewarding, as I am sure you have seen throuhg your
FW endeavors. But if I were going to start in
SW, I would start with a bigger tank.
Lastly, before you do anything, read everything you can get your hands on. Articles on here, everywhere on the internet, books, anything.
SW takes a LOT of research and knowledge to be succesful. So, read, read, and read some more!
Good luck however you choose to go. We are here for ya.