Hello CathyQ, welcome to Stamp Community!

It is wonderful to hear that you have taken so good care of your heritage and treasured it. Appreciating what you have when you have it is great.
Your stamps, as mentioned above, could be in danger, but only if they were stored in an album that uses some sort of all-page glue to stick the things into an order.
If they were instead in an album that used plastic sleeves or pages only, and no glue or adhesive, to hold them, then they will be OK hopefully, if not exposed to sunlight too much or dust and mold.
Some times the worth or monetary value of stamps is determined by how much someone wants them or is willing to pay for them.
To sell them indibidually or as sets or small groups on
ebay or Delcampe yourself (with a PayPal account of course) (both indeed learning experiences), you would perhaps realise more money in return for your treasures.
Their value on the market would not reflect any you have additionally placed upon them by emotional closeness or family though. Sad as that may be.
The condition of the stamps and covers is usually taken into considertion when a buyer or reseller is looking at them to assess them. Centering, good color, gum on new mint stamps, good clear cancels or light cancels on used stamps, etc , etc.
No mars, nicks, tears, thins, etc should be on a good condition stamp. Then there is the grading which some collectors pay attention to.
I think your best bet is to sell them as topical or thematic collections or singles. They might not all sell at once though. Over time only.
To sell them all at once you will get less per stamp as people are usually buying for what they collect and not for the other stamps included within the group or lot.
Have a look around on
ebay, paying attention to worldwide slaes if you wish to sell to other collectors, and to how the stamps are described and what categories they are in.
Otherwise a few good photos, generally speaking, with some later zoomed in close shots on any key values would be helpful for us to see them.
Please remember that posting them in a general Worldwide section of the general forum (SCF) will get you many more opinions than in the welcome thread here.
Best Regards,
Doug