The best type of file to use for faring the hull is a half round one side and flat on the other side. Looking at the picture I'd say that you need to come to a point along the false keel It would pay to draw a line down the centre of the false keel so you have a guide of where the centre is.
We also need to think about the next job and what tools we need. A glue dropper for PVA. a syringe with a blunt needle is good value. I sit mine in water needle first when not in use so the needle does not dry up. They mentioned superglue for spot gluing as it is a curve deck planking. I don't like pencils for caulking and have been using a Zig painty pen. This is the type I have been using http://www.ebay.com.au/itm/Zig-Painty-F ... 5M1kSiHrcQ
and the postage is free, I use the side of th pen nib. You need to test the timber that you are using just to make sure it does not bleed into the timber. Also some clamps, something like these https://www.hobbytools.com.au/spring-cl ... pack-of-8/
Masking or painters tape could be used but you will probably need clamps at some stage of the build. A painter scraper blade https://www.bunnings.com.au/craftright- ... t_p5760306
Keep the photos coming and take your time.