You could transfer the plant with eggs. If you do, make sure that there's some flow over them, an airstone will do, to try to keep them fresh. I used to use a potion mixture of antifungals in the water as well, but it's not absolutely necessary.Then you wait for the free swimming stage and start with very fine fry food. You're better off in an undecorated tank with no substrate, makes the fry easier to find and helps to clear up excess food easily. At a push a storage box works fine, although chemicals may stain them permanently.
Otherwise you could leave the parents with them. Angels range from great parents to terrible. Some get the idea after a couple of attempts.
I warn you now, angel breeding is addictive.