Hi there
Livebearers such as your Mollies and Your platies will tend to eat some of your plants. I would go species such as Elodea, Cabomba Caroliniana, and Java Ferns, They shouldnt go near the Java Fern, but will have a nibble at the Cabomba, However this plant grows QUICK in low light, No Co2, No Fert Set ups so you will constantly be trimming the plant and will not notice the bite marks from the leaves
Cabomba is a super hardy plant and tends not too melt away, Neither does the java fern or elodea.
Java Mosses are also great for the Fry if they do have any

Once again should not Melt Away
I have had a poor success rate with Wysteria and always rots and dies with me if I plant in in Sand substrate. It can be left floating though which seems to do well
Place Your plants straight into the tank, Some will melt, some wont, some will come back, some wont. Its trial and error really to see what comes back in your tank, and what you can support.
Are you intending to dose CO2, Ferts etc, High Lighting? Or going low tech and low budget with Low lighting (1-2WPG), NO Co2, Minimal Ferts
If you are going High Tech - You will need to does Ferts, Regularly, EI Dosing or a good All In One solution. You will also need a CO2 element some where.
Low Tech is easier, and great for your Mollies and Platys which are relatively Cheap. A dose of Ferts once a week is all you need. Something like API Leaf Zone for a basic fert.
Moneyw
ort is a Moderate difficulty plant to grow and usually requires Moderate to High Lighting levels. It will be a background lant and likes a pH of 6.5-7.5. They can grow to a foot in length and will need a good Fert to thrive. If your new to Plants, I would start off simple with the cabomba, Java Fern, Vallis and Java moss, and get some success early, then look at more challenging plants
