Of late I find a good number of youngsters from IT /software field turning to farming and I salute them for their bold attempt ( which boldness I lack ). And I wish them all success.
Just I want to share a few thoughts.
All natural farming stalwarts have been inspired by nature , especially forests. So look and observe nature.
Don’t make the mistake that since you have assured water supply , you can grow anything at anytime.
The growth of a plant depends mainly on the season , soil type and condition , water supply etc.
The right first step should be to improve the microbial activity in the land which needs growing thickly some leguminous crops along with growing mulch giving trees on the bund. Use of cow dung of desi cow in the form of Jiwamrutha , Panchagavya , Amruth Pani etc may be highly helpful.
Tilling is harmful but this can not be avoided in the initial years. You may go in for manual seeder like one supplied by dhartiagro.net , the usage of which minimises soil disturbance.
Mulching is of paramount importance in controlling weeds and improving microbial activity in the land.
After sowing , try to minimise entering the field as this would affect the micro organisms near the surface of the soil .
Maintain the soil moist but not wet ( just like composting ). Even in rice fields , people don’t keep the water always available. Just they irrigate the field for about an inch and leave it to dry and then re-irrigate.
In the initial years , the farm output may be just a half of what the neighbours get , but it definitely improves with time.
Good luck .