Definitely start from seeds! The only stuff I didn't start from seed are fruit trees because I'm way too old to wait that long.
I don't know where you are but look into native wildflower mixes of annuals and perennials for your area that will attract pollinators and reseed/come back in the following years.
Last year since it was my first, I went a little crazy with seeds for different varieties of vegetables, herbs and flowers. But I'm glad I did since what did well was kind of surprising. This year I'm relying on tons of volunteers (tomatoes, basil, parsley, fennel, sunflowers, cosmos, calendula) and holdovers (chard, kale, arugula, sorrel, mint).