Not necessarily great advice.Keep it simple.
Very few people study those great long ones.
I used to leave out two patches of over a year each. Two crap employers whose references would reflect my resentment! “Self employed“ in whatever capacity is flexible.
I’m not suggesting untruth, just the best selection for the job at issue. After all it’s what they did for the Bible
I used chatGPT to write the last two targets for my appraisal....Ditto; I drilled down into gaps deeper than any lovely words about great projects completed when I was interviewing. There are good reasons for gaps, be honest about them.
Don't laugh, but go onto ChatGPT, ask it to give you a layout for a CV for an archaeologist, say you want it to include these qualifications and these jobs - you could be pleasantly surprised at what comes out. You then just need to a) correct any mistakes and b) add more detail and experience in the right place