Don't waste time by applying for things that you don't want to do/aren't suitable for, as rejection is demoralising but you didn't want the job anyway.
Explore contacts, nepotism is alive and well although often quite discrete these days! You will still likely need to apply and interview, but companies value a recommendation, it will give you an edge over equal but unknown candidates.
Consider talking to a recruitment agency if you're not sure what you are suitable for, as they will have an idea of which clients your skills will match with.
Don't be afraid to ask early on what the salary range is, no point applying if it's a non-starter for you financially. Likewise ask what the recruitment process involves and the anticipated timeline is so you know what to expect.
Find out if there is any interview guidance available. I had a government job interview, for which there was loads of information available to internal candidates, but not externals. It might be worth asking if they can share what they have. In my case it defined what they meant by certain 'competencies' which I interpreted differently at the time of interview (having not seen the guidance until after I got the job).
Keep at it, and good luck.