Hi seegul,
I would follow Charles advise on initial bed/soil prep and mulch the area with 3 – 6″ of FYM.
I usually start in these beds with early Potatoes and follow with Spring Cabbage. When I have harvested the Cabbage I apply 2 – 3″ of FYM/Compost for following crops. This effectively keeps the bed covered with crops for 12 months , March year1 to February year2. After you have applied the 2-3″ of well rotted FYM/Compost you are then ready for the Legumes , Alliums or roots for the rest of year2.
If you follow this cycle your soil will be continually improving. I would strongly suggest reading any of Charles Books on no-dig for much more detailed info on the above.
Don.