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mark rendelman here hull#24( aka Barbara Kay) I purchased a set of plans to help with construction because I wanted to make the solid wood out of something other than pine they are quite helpful since they are full size templates when I built my boat i chose to raise the seat tops because I have just the opposite of you iam 5’6 .if you call Alan at the shop he can look up the height from seat top to roof on his cad drawings as for the finger joints they can be re placed with normal scarf join If lall you have is a jig saw to cut out the parts it will make this build very challenging you should at least have a table saw