If you have the patience, a dry start method is the best solution. Basically, just add a wet substrate to the tank and don't fill it with water. You don't even really need to plant the foreground plants, just lay the plant nodes onto the wet soil they'll eventually anchor themselves. In a month you'll have a nice lawn that is securely anchored.
You just need to keep the substrate very damp and the tank humid. For small tanks covering the top with plastic wrap works well. No need to pump CO2 since the amount in the air is sufficient. When keeping the substrate wet add some nutrients to the water, or use ADA aquasoil and not add any at all.
The dry method works well with glosso, HC, and dwarf hairgrass. Doesn't work so well with dwarf clovers because their emerse and submersed growth are very different.