I've heard you are NOT supposed to bury them in the substrate at first. Just drop them in the tank, and wait for them to start sprouting and growing roots. Then you can plant them under the gravel. Apparently you don't want to bury them until you know where the crown of the bulb is; that just makes life easy on them.
About the algae thing, yes you would probably get algae in a high light tank with only one plant and no dosing schedule. If you want high light, you will also need to dose ferts and CO2. However, with medium/low light tanks (like mine), you don't have to worry too much about lack of nutrients unless you are heavily planted. Algae only occurs if there is an imbalance, whether it is too much or too little: light, nutrients, or CO2. If you are able to get everything to a happy medium, then you won't see much algae. Unfortunately, finding said happy medium is not very easy at first. I've found mine in my 55 though, and I don't see very much algae at all; just a little bit of hair algae on the glass.