Where to start? Help needed please!

[Martin H]

Don't forget to befriend your fellow plot holders, often they have excess plants they will swap or give away.

This is very true. You often get conversations like...

"Your runner beans have really taken off well, I'm impressed! I wish I'd got my plot earlier, I'd have started some myself..."
"I've got half a dozen spares that I'm not going to need, would you like them?"

Result!

And remember, the point is to have fun and enjoy it!