If you are not confident that you can get all your new plot into production this season, the beds that you are postponing can be shallow and roughly cleared and seeded with a green manure. The green manure will give the weeds a hard time and also help your plot fertility. Its not a lot of work, really and it is a great morale boost so see something growing.
My favourite green manure is phacelia tenacitifolia because its flowers are so popular with bumble bees.
For a quick rough and ready clearance see if you can borrow a Canterbury hoe from someone. Once you have got used to its ways you can be very productive if you don't want to dig deep. Follow up with a three prong cultivator when the soil is dry enough, again don't go deep. Broadcast the green manure seeds. Enjoy. Dig your green manure crop into the soil during autumn or winter. Get the beds into your rotation pattern.