With millet I’d do some staggered planting dates in 4 strips, And skip a swath between them. you could disk up fallow swaths a week before season and throw wheat out.
Millet is pretty easy but I’d still look at lime and fertilizer recommendations from a soil test. I’d spray glyphosate and then drill into that. Can spray 24d over the top off you have a broadleaf weed issue. Grasses produce seed so in this situation I wouldn’t try to get them killed. Personally once mature id bushhog and burn 1 strip a week starting in first weekend of August.