Samick Sage does not get a 58" string, unless you want a high brace or the string wasn't pre-stretched. I've strung up several, have one or two in my shop now, and they get a 58.5" string. My personal preference is 18-20 strands of BCY-X.
35# is plenty for Southern whitetails. Unless it's changed, AL has no draw weight restrictions.
https://www.gearheadarchery.com/pages/regulations I haven't killed a deer with 35#, but I know a young lady (know her very well) who has killed a few pulling around 25@24 on a recurve. 125 grain Ace 2-blade broadhead, Beman ICS Hunter Jr. arrow, total weight just over 400 grains IIRC. At least one shot was stepped off at approximately 26 yds.
Do the same thing you would do with any other bow. Very sharp broadhead, tune for perfect flight, wait for a good shot, put it in the right spot.
I don't remember the issue, but Primitive Archer did a story about "bird points" (small stone points). A fellow took a "poorly made" (his words) osage selfbow that was around 40# draw, cane arrows, and stone points and tested them on a freshly killed whitetail carcass. He got more than enough penetration for a quick kill.