I've done so many it's more monotonous then anything these days.

I keep one of those quick pop up canopies for when there is no shade, and I have to work in one spot for awhile.

There are a ton of YouTube videos that give an overview on how to build stairs.

Your area may have different requirements then others, so it's hard to say what you have to do specifically.

Main things to keep in mind, the height of the deck from the ground. Once you know this, you can easily figure out the number of treads you'll need. I try to always keep the height of each rise between 7.5" and 8". I also always cut the tread to 10", which will leave about an 1 1/4" overhang when using two 5/4 deck boards (or 2x6's if you prefer), and with a 1x8 riser board. We're required by code to have the riser board around here.

I always use a top and bottom board to tie all the stringers together. I prefer to leave the outside stringers full size, and cut any inside stringers to fit inside those boards. We're not required to use hangers for the stringers, so I make sure I put at least one timberlock into each stringer, through the header board.

How you set posts at the bottom is up to you, unless it's dictated by the code. I normally place mine in front of the bottom step (when they're being sunk into the ground), and inside the bottom step if the stairs are on resting on a concrete pad. We're still allowed to bury posts here.

The biggest mistake most people make, is to not deduct for the riser board at the top, and for the stair tread height at the bottom when cutting the stringers. As an example, if your stringer is going to be 10" tread with an 8" rise, at the bottom the rise will be reduced by the height of the tread. So if you're using a 5/4 board, the height will be 7" instead of 8". At the top, if you you're using a 1x as your riser board, then the tread will be cut to 9 1/4" to allow for that difference.