^^^ believe it or not, if you stay up with it even weekly, pulling crabgrass by hand is easy and effective. Growing up, we serviced a client who had the most amazing lawn and would not allow chemical treatments, so every week after mowing we'd walk the property and pull any crabgrass. It took two of us 5 minutes per week to do a quarter acre. Easy. I just read through the other stuff you're looking to do, You're trying to pack a LOT of differing functions into a small space. Have you used the "find a local pro" feature here to find a landscape designer? You'll want to find someone skilled with space planning, who also understands deck and porch construction from what you've listed. There's not a lot of us but we're out there. If you can find that person in your area it'll be well worth it.

if it has shade all day, then grass will not grow. you should consider a shade loving ground cover in the shaded areas.

If you like gardening, consider some red and purple tulips to bring attention to your entry. I love the look of purple with your house color. Go to your local nursery, with pictures and ask for their advice. I'd also consider adding some color to your area to the left of your doorway, perhaps some colorful ground cover, like the sedum spurium.

Well, it looks like a wholly unprepared site for seeding, to me. Rocky, uneven, perhaps compacted in some areas. What's your geographical location and what kind of grass seed (variety, not brand) did you use? What did you expect the straw to contribute to your seed germination success?