1) I'd learn about weeds and 2) learn about
compost. Start making it and/or finding sources of it. Chip the wood that was cut down if you can for mulch and compost.
This comment and link might seem off-topic, but I learned a lot from what this guy teaches about weeds, which I feel like applies equally to any planting. I feel like he has excellent techniques and strategies for organic weed-control, (other than mulch), like using tarps, flame, timing, etc. I still like mulching the best, and that's a more common permaculture way, but maybe that method isn't always suitable or ideal, like with lawns or farming.
I definitely screwed up last year by planting a lawn and not dealing with the dormant weed seeds first.
I'd strongly encourage you to plant something more productive and/or lower maintenance than a lawn... but you know, some people just love lawns.
Personally I'd rather convert lawn to gardens of some sort. Either way, I'd say 1) I'd learn about weeds and 2) learn about compost.