Matt
The ability to build models obviously depends upon an individuals experience not only of building but also of reading and following plans, if you have never built from plans then I would suggest that you start on something simpler such as the Twinkler that you have been talking about.
The seaplane tender is a fairly straightforward plan to follow and a very good introduction to larger models like the RAF Rescue / Fire boat and Sea Commander but if you don't have much experience it will end up like a dogs dinner.
My advice is to continue with the Twinkler which has plans and a detailed set of building instructions courtesy of Dave's article
…..and if Dave can build it then anyone can
…..
Building the Twinkler will give you lots of experience from which you could then move onto the seaplane tender.
Hope this helps
Paul
Edited By Paul T on 11/02/2016 10:57:16