Just tie it to your wood & be patient. Be gentle when tying it down & make sure you don't cut into the rhizome with the string or what ever you use to tie it down. Maybe have to give it the occasional wipe down with your fingers if algae starts to form on the leaves & stems but other than that it will mostly take care of itself.
Seeing as you are planting out your tank I suggest getting 4-6 Otos & at leat one maybe 2 SAE to take care of any algae that may pop up.
I only come up with 41" of fish in your tank. Corys & barbs will eat a tiny bit of algae but not a whole lot. The corys won't eat algae off the leaves very often because they are always on the bottom & the barbs will only nibble at algae that forms on the edges of the leaves. You have room for 3-4 Otos, no problem & probably still fit a SAE in on top of that. Just my opinion though. You might not want your tank that stocked or you might not want any algae eaters. People do have planted tanks without algae eaters. It's entirely up to your personal preferences really.