For a new project I first try to get an overview about the specifications, hosting and platform.

Depending on this information I decide which language and frameworks (if any) to use.

Basically always the first part I create is the backend, so I have all the data interfaces ready. For web stuff Postman is really useful.

Later on I start with the frontend, get myself really angry because I hate frontend.
Then I get into a hate-overdrive because browsers suck and I delete everything and quit.