Sounds like you are ready to go, But take it easy, don't go crazy, or all the hard work and time put in will be wasted, The bio load that is built up in your tank, is able to handle what is in your tank at that time. It takes time to build it up. So just get a few snails at a time. Wait a week then add a few more. This is also true especailly with the fish. Set up a QT Tank before you start buying your fish so it will be ready to go when the time comes to start buying your fish. A QT tank is as important to this hobby as a skimmer, lights and even saltwater. It can save you alot of headaches and heartaches down the road.
Just get one fish at a time, get the least aggressive first, don't ever impulse buy, If you see a fish you like see if you can put a deposit down on it to hold it for a week, This will give you time to research the care and needs of that fish, check if it is compatible with the fish you already have or plan on getting down the road, And lastly I gives you a chance to make sure that fish is healthy, There are alot of problem with fish that you won't be able to see just by looking at it. And you don't want to spend your hard earned money to buy a fish and take it home to die in your tanks.But don't ever concider a fish that has any type of film, bubbles covering its body, if the fins are damaged, eyes don't look good anything, chances are not going to be good for that fish. Look at any fish real well, if you like that fish, ask the store to feed the fish. don't let them get away with feeding brine shrimp. Brine shrimp is like ice cream to a kid, even if they don't feel well they will eat it, You need to be sure the fish will eat. If they don't eat in the store they may not eat for you. Now got out and start stocking your tank,