villain 32/21 over 15 hands, basically unknown

Not entirely sure what the best play is range-wise vs exploitatively. Decided to 3bet in the end but the board is so dry and locked that I probably don't even need to have a wide 3betting range, especially not with a str8 without freerolling potential. I think I can even float my blocker hands that I want to play back with instead of 3bet.

Is it fine as played if I fold here? I mean, the board blocks a lot of boats but I still don't think he takes this line with much else. Don't think he pots 87 like that and very likely no bluff either.