The Forces Employment Charity has an online workshop 'LinkedIn Essentials', which is free for the whole military community (including Families) to join.
Registrations are now live. Past feedback received says, “The most useful LinkedIn session I have attended to date. No sales speak or jargon, just practical advice and thoughts with supporting reasoning. Really helpful and much appreciated thank you."
Register here: https://loom.ly/kazxuKc
It's also advertised on Facebook and LinkedIn.