As long as you got a small piece of driftwood I don't think it would look to crowded. I would get driftwood for my tank, but its crazy expensive around here for some reason :/
I have LED lights in my tank, so I don't know if its gonna be different for you, but I don't even do anything for my anubias and it grows beautifully on its own. I think I got mine for $5.00(?) from Big Als. You don't bury them, you can tie them to decor, like the driftwood, and the roots will grow onto the wood. I believe you can use fertilizer for them as well.
If you have a petsmart around you, they come in the TopFin Tubes for anywhere from $5-8 (for the larger ones). As Kath said, theyre pretty easy :D
They can float, too- they look really nice that way. Great place for a sleepy betta. OR, take a rock, just...a rock (lol!) and tie the anubias to it with string and bury the ROCK and not the rhizome (hard root) and it'll be fine! :D
As for the wood, some LFS will cut the wood for you in-store! A few around here will. Ask if they will for you.
As a reminder: The wood often sold in the reptile/terrarium sections arent safe for fish tanks most of the time! Ask the LFS manager about them, if they seem knowledgeable. Good wood is hardwoods like mopani and Malaysian driftwoods!
PewPewPew is the Betta knowledge goddess around here! Reading on so many post by so many people, and she is definitely the one to include in any topic :)
I have Anubias - my fish guy told me it will need a light or at least sunlight. Thus far it doesn't appear to have degraded from the aquarium it was in, into my tank where it currently doesn't have a light or direct sunlight.
It's currently grown into a nice pice of driftwood, the diftwood has holes and what not, but I think they're too small for Victor at the moment. Either that or he doesn't like dark places hehe.
I will probably add a half ceramic pot soon for a larger cave. But one thing I've noticed is that I always catch him lazing about on it's leaves - guess its nice and comfy for him :D