Firstly Peter, I don't think people worry about typos.

What sort of advice are you after? I recently built some raised beds
myself. 4 beds, about 12 feet by 4 feet each. We bought some treated
timber from Jewsons that was 9" x 2" and screwed it together using
standard brackets and screws.

We did consider buying scaffold boards and treating them ourselves, and
we looked round a couple of reclamation yards, but in the end decided
that it was quicker, easier, more environmentally-friendly and more
likely to give us what we needed, to just go to the timber yard.

They also sawed it as we wanted, so when it arrived I had only to screw
the pieces together. I have done virtually nothing with wood in my
life, so I'd say that there is no need to be worried about being "not
the most skillful of wood workers".

What are you planning to grow?

Will