Attracting birds to your garden can be as easy as putting out a feeder and a birdbath. If you keep the feeder filled and the birdbath filled with fresh water...they will come.
There are a few other things you can offer to sweeten the pot and increase your population of bird species. I have holly trees that offer up berries for the birds. They seem to love those berries (along with pooping the seeds from those berries on my mailbox lol). I also have flowers such as cone flowers and zinnias that offer seeds to make the birds happy. If there are trees or bushes with fruit or berries then the birds will come for them...although this can be an annoyance if you are trying to harvest that fruit for yourself. I try to offer enough fruit trees and bushes to make them and me happy if possible.
It is important to note that if you use pesticides then that will have an adverse effect on the birds because the birds eat bugs and pesticides are not choosy about what they kill...kill the bugs and you will kill birds too. Another benefit of having birds around is that they eat bugs and this includes bugs that attack your garden and mosquitoes too.
To bake the seed in the oven I bake it at 300° in 9 x 12 pans for about 30 minutes. I will stir the seed around from time to time during that time to ensure that all the seed is baked.
To microwave the seed, I spread the birdseed out on a microwave safe platter or large bowl. I set the microwave on high for 2 to 4 minutes. Be sure that all the seed gets cooked.
After baking or microwaving the seed, I let it cool completely and store it in an airtight container.
Another great way to attract birds is with nesting boxes or bird houses. Each bird has different requirements for this such as size and type. Some birds are very particular about what size of hole can be in the birdhouse. You can do research for this online to learn what each species requires according to what types you want to attract.
Nesting material can be offered to the birds and it can be quite entertaining to watch the birds collecting this. I like to leave the cocoa liners up for extra time to give the birds a chance at it. One could actually put up a container for this just as an offering for the birds. Birds also love yarn, dryer lint, straw, grasses, and even feathers for this. These can be placed in a basket attached to the fence or hung in a tree. They can also be offered up in one of those suet cages.
Suet is something that can help the birds to get through the winter months as well as early spring because it offers quick energy for the birds. Be sure to continue feeding the birds through the winter months if possible. The birds will not stay too long, they will leave when it is time to leave so no worries about leaving it out too long. Some of the birds will stay year round.
Adding even a few of the above ingredients will attract the birds and give you many moments of enjoyment watching their antics and hearing the birds sing their beautiful songs.