First of all, if you’re not using LinkedIn, why not? LinkedIn is social media dedicated to employers. The person looking to offer you a job may well be sitting on there at this current moment. If you’re not using it set up a profile right now!
We all have mental health like we have physical health, but at any time you can become mentally unwell, just as you can become physically unwell. In some cases, this can lead to long-term absences from work.