What are the some best microgreens to grow at home?

Welcome markcalloway! One thing I can say is try doing small in the beginning and see how it goes. There maybe times you want to tweak something after you get started

Where are you from or what zone are you in?

You are right lilolpeapicker moving forward with small steps is important rather than rash into something. I am from Australia, Sydney.

I prefer microgreens with larger seeds and milder flavor. My two favorites are sunflowers and peas. I dont like spicy taste. Another one a lot of people grow is radish - germinates fast, produces larger seedlings, and seed is inexpensive and easy to find. I've also tried broccoli and arugula - also easy, but I dont like the strong flavor. 

Peas, if you harvest them above the bottom leaves, you can get more than one harvest. Not so with those you cut beneath the cotyledons. And with peas, after harvest, you can plant the 'root ball' outside, later get vines and pods. Not primo, but something.

For home use, I use various smaller containers with at least an inch deep, and drainage. Purchased berry clam shells are great - the long, low ones. The micros are not in them long so an extensive root system is not necessary.

I've found that if you put the soil flush with the top of the container, layer the soaked seeds on top of that, water/spray, then cover with a tile instead of soil, you get a cleaner product with fewer steps. The weight of the tile encourages emerging roots to grow downwards and once germinated enough (when the seedlings begin to force the tile upwards, you remove the tile and let them grow a little more - not yet in full light. You want them leggy for easier harvesting later. Then put them in light to green up. I use strong window lighting, usually. Timing is something that comes with experience and your preferences. 

I want to grow more heading into fall/winter this year. They are so easy and so good, and grown at home, inexpensive and super fresh. If no disease, you can reuse the planting mix, though with sunflowers, I do scrape off as much of the seed coats/shells as possible since they can have an inhibitory affect in some circumstances. I dont care if there are still roots in the soil - they are just more clean organic matter. Some people give the harvested 'root balls' to their chickens. But I dont have chickens, ...and I do like reusing the soil. 

You can use sunflower bird seed, but the seed isnt as clean, and you don't get as good germination. I might try it again however, and purchased from a store with higher turnover so the seed will be more likely to be fresh. One of the things I'm planting in the outside garden is black oil sunflowers to grow my own seed. 

I've just finished setting up a new germination station in a room more central so I'll be more likely to keep an eye on them, and keep succession planting on track. Just planted yesterday soaked sunflower seeds and peas.