Hi PT19,
the g26 will be fine.
I personally think it's a strait forward kit to build, but there is a fair bit to do being a biplane.
Just read through the whole book first, then when starting the build always look a few steps forward to plan your next move.
I made some huge mistakes by beefing a lot of parts up and made the model heavy(20lb), but it still flies fine.
try not to add too much weight especially in the tail.