repot:
First off, repot. At the least, get new soil. Remove the plant and rake off the soil using a chopstick or a plastic fork.
Soil:
For soil.... we will assume that you do have a ficus. I would go to home depot and get a bag of schultz 'profile' or 'aquatic planting medium' it will be called either and not all home depots carry it. You will probably have to ask for it and then describe what it is ( 10 pound bag of fired clay to plant aquatic plants in, in the pond section or in the soil section). Ok, so you got that now, plant your plant back into the same pot using 100% profile. You could add some bark into the soil mix but I would not bother with it. YouÂre a beginner, so we will keep it simple.
water:
Now, water it using tap water, rainwater, aquarium water, if it is a ficus, the water quality really doesnÂt matter. Ok, so now you watered it, do it again. Now water when the soil is dry about 1/2 way down. Or put a chopstick in the soil and keep it there. TO check to see if it needs watering, pull the stick, if its damp, it does not need water. Put the chopstick back in the soil.
Placement:
Ok, put the plant A) outside if the chance of frost of freezing is gone, but put it in the shade till it gets used to being outside. Say about 1 week, then get it in some direct sun. B) In indirect window light, inside if the chance of frost or freezing has not past. Move to step A when the chance of frost of freezing has past.

Write back here when the plants get bigger and well tell you how to prune... Better yet, If you really think you are going to get into this hobby, buy some books or go to your local libray ( or the next town over, I dont care if its local ).

Just to make sure itÂs a ficus, does it have oval leafs with No serrated edges? That is the edges are smooth? When you break off a leaf does it oouzzz out a white milky sap? Are the leafs alternate?
If you said yes to these then I will guess itÂs a ficus.