Basically, I'm trying to get travel insurance, but I'm having 3 issues which are confusing me!

Firstly- I'm 17 when we set off on our journey, and I can't seem to find any where to get travel insurance for just one traveller if they're under 18? Is the only answer to book it with a friend as well and make them (18) the lead passenger?

Secondly, although I'm 17 for the duration of the holiday- I turn 18 on the day we travel home! Does this complicate things at all? Because things seem to be cheaper for under 18's- will I be uninsured for my journey home?

Thirdly- do you have to declare any medical conditions/ medications/ diagnosis's? Because if you do- I need to check with my doctor what I even need to declare!

Can anyone please help, I'm so confused!
You should declare everything as otherwise your insurance will be invalid. Also try theycompare.co.uk, confused.com to see if you can get travel insurance on your own name and to compare quotes.
a minor is not able to make a contract and an insurance policy of any kind would be a contract