Well, I have enough sun. However, when I start seeds it never fails that something gets in the way of transplanting them. So all that effort, and fizzle. That makes me sad too.
If I am in the spring, I planted a lot in McD's salad containers, vented the lid, drainage holes burned with my woodburner, covered and put in shade. Then transplant individually into plastic cups or better yet, small groups of plants "sliced" out of the tray and put in a depression where they will grow. Can thin in situ or not, survival of the fittest, but it's imperative they be kept moist until they get their roots deep enough.
Finally I had great success planting in place, just a few seeds to ensure some will germinate, covering with a pepsi bottle cut off at the base, then pushed into the soil. Can just scratch a spot. Water well. Keep the cap off the bottle so the seedlings won't get too hot; the bottle keeps them from drying out. They can take a lot of sun until it really gets hot, maybe even then.
When the ground around the bottle looks a little dry, water generously around the bottle but don't flood. I suppose it's a good idea to take the bottle off a little at a time if you have the patience. When it is overcast, the seedlings are pretty safe as long as you don't let the soil dry out. And don't water over the top of them like with hose spray; water the ground around.
It's a good method when the sun gets hot which seedlings can't take otherwise. Someone gave me that tip and it is great! You probably knew a lot of this.
I planted in all sorts of things. Some I never got around to transplanting and a storm decided where they were to grow, if they would. That's how I got my bludbells; the tray they were in got overturned; they were a nice surprise.