Available worldwide, but with zero woodwork involved unless you really want it, the Revell 1:72 Snowberry. A plastic display kit with plenty of conversion options and opportunities to think your way around them. Low cost, big enough to get both hands into, small enough to carry around. Electric power, which for me is the simple reliable option.
Modest performance is generally good for a first boat. Faster boats tend to throw their surprises rather suddenly, and water is an unforgiving playground. You can't walk over to get the bits back.