I wish I could help but I'm out of date on the subject I guess. When I was about 13 years old a neighborhood friend of the family give me a stamp collection that I wish I still had today. At the time I started a collection off of that. I went to a U.S. Post office and purchased a stamp book of my own to add to my collection at the time, it was one of the Space Exploration or Nasa book, I can't remember the title. I purchased a book that told you the value of the stamps, at the time I had several that were worth a decent amount of money then, but probably worth a lot of money now.
To make a long story short, me being a kid and not knowing any better I took all my stamps and put them in one of those photo albums where it has the sticky stuff on the pages and clear plastic to cover the pictures, I think that probably destroyed the value of them.
Either way, what ended up happening was my stamps collection ended up with some family members and probably got sold for next to nothing. But that's ok, it was nobody's fault but my own because if it would have mattered enough for me to keep up with it I would have done so.
I have a few stamps now, they are kept in a safe place, they were given to me by some relatives that have passed away. I think I have the Walt Disney stamp, not sure.
I don't know how the postal service works where you live, and I haven't been to the U.S. post office in years, but it used to be that you could go to the U.S. Post office and buy stamp collecting books and such things. Maybe it's not like that anymore.
Either way, that's a nice collection, I wouldn't sell them or give them away unless you need money for some reason and cane make some to help you or your family, the reason I say that is they were given to you for you to have and not to be given away. LOL, sorry to preach, that thought just crossed my mind because my nephew had some collectable stuff given to him a couple of weeks ago and he kept trying to give a few things away and I told him pretty much what I just said to you.